All About Digital

Penanganan Barang Bukti Digital Dalam Persidangan

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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Para
ahli atau pakar dalam bidang forensik, khususnya forensika digital mempunyai
standar dalam proses penanganan barang bukti. Hal tersebut digunakan supaya
dalam proses penyidikan, data-data yang didapatkan berasal dari sumber asli,
sehingga tidak ada manipulasi bentuk, isi, dan kualitas data digital. Proses
penanganan barang bukti hingga presentasi data dalam digital forensik
diantaranya:</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">A. Prosedur
Penanganan Awal Di TKP</span></b></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">1.<span style="font: 7.0pt "Times New Roman";">       
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Preparations (persiapan)</span></b></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sebelum ke TKP untuk
melaksanakan penggeledahan kasus yang berkaitan dengan barang bukti eletronik,
maka analisis forensic dan investigator terlebih dulu hal-hal atau peralatan yang
nantinya dibutuhkan selama proses penggeledahan di TK. Hal-hal yang harus
dipersiapkan dan dimiliki oleh analisis forensic dan investigator :</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">a.<span style="font: 7.0pt "Times New Roman";">    </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Administrasi
penyidikan : seperti surat perintah penggeledahan dan surat perintah penyitaan.
</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">b.<span style="font: 7.0pt "Times New Roman";">    </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Kamera
digital : digunakan untuk memotrek TKP dan barang bukti secara fotografi forensic
(foto umum, foto menengah dan foto close up).</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">c.<span style="font: 7.0pt "Times New Roman";">    </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Peralatan
tulis : untuk mencatat antara lain spesifikasi teknis computer dan keterangan para
saksi. </span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">d.<span style="font: 7.0pt "Times New Roman";">   </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Nomor,
skala ukur, label lembaga, serta sticker label kosong : untuk menandai masing masing
barang bukti eletronik yg ditemukan di TKP. </span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">e.<span style="font: 7.0pt "Times New Roman";">    </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Formulir
penerimaan barang bukti : digunakan untuk kepentingan <b>chain of custody </b>yaitu
metodologi untuk menjaga keutuhan barang bukti dimulai dari TKP. </span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">f.<span style="font: 7.0pt "Times New Roman";">     </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Triage
tools : digunakan untuk kegiatan triage forensik terhadap barang bukti computer
yang ditemukan dalam keadaan hidup (on).</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">2.<span style="font: 7.0pt "Times New Roman";">       
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Preserving (memelihara dan
mengamankan data)</span></b></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Merupakan serangkaian aktifitas yang
dilakukan oleh penyidik yang sudah ahli, untuk menjamin agar data-data yang
dikumpulkan tidak berubah.</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">3.<span style="font: 7.0pt "Times New Roman";">       
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Collecting (mengumpulkan data)</span></b></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Merupakan serangkaian kegiatan untuk
mengumpulkan data-data sebanyak mungkin untuk mendukung proses penyidikan dalam
rangka pencarian barang bukti.</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">4.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Confirming (menetapkan data)</span></b></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Merupakan serangkaian kegiatan untuk
menetapkan data-data yang berhubungan dengan kasus yang terjadi.</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">5.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Identifying (mengenali data)</span></b></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Merupakan serangkaian
kegiatan untuk melakukan proses identifikasi terhadap data-data</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">yang sudah ada agar
memastikan bahwa data tersebut memang unik dan asli sesuai dengan yang terdapat
pada tempat kejadian perkara. Untuk data digital, misalnya melakukan identifikasi
dengan teknik hashing (membuat sidik jari digital terhadap barang bukti)</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">B. Prosedur
Penanganan Di Laboratorium</span></b></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">1.<span style="font: 7.0pt "Times New Roman";">       
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Administrasi Penerimaan</span></b></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Pada tahapan ini,
barang bukti computer yang masu dan diterima petugas laboratorium, yang dalam
hal ini analisis forensic harus dicatat secara detail dalam di dalam log book, disamping
di formulir penerimaan. Berikut data yang harus dicatat:</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">a.<span style="font: 7.0pt "Times New Roman";">       </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Nama
lembaga pengirim barang bukti eletronik</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">b.<span style="font: 7.0pt "Times New Roman";">      </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Nama
petugas pengirim barang bukti eletronik, termasuk identitasnya secara lengkap.</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">c.<span style="font: 7.0pt "Times New Roman";">       </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Tanggal
penerimaan.</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">d.<span style="font: 7.0pt "Times New Roman";">      </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Jumlah
barang bukti eletronik yang diterima, dilengkapi dengan sfesipikasi teknisnya seperti
merek, model, dan serial/product number serta ukuran (size).</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">e.<span style="font: 7.0pt "Times New Roman";">       </span></span></span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">System
hashing, yaitu suatu sistem pengecekan otentikasi isi dari suatu file (baik image/evidence
file maupun file logical) dengan menggunakan algoritma matematika seperti MD5,
SHA1, dan lain-lain.</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">2.<span style="font: 7.0pt "Times New Roman";">       
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Ivestigation (pemeriksaan)</span></b></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Pada tahapan ini,
terhadap image file dilakukan pemeriksaan secara komprehensit dengan maksud
untuk mendapatkan data digital yang sesuai dengan investigasi, ini artinya
analisis forensik harus mendapatkan gambaran fakta kasus yang lengkap dari
investigator, sehingga apa yang dicari dan akhirnya ditemukan oleh analisis
forensic adalah sama (matching) seperti yang diharapkan oleh investigator untuk
pengembanagan investigasinya. Setelah mendapatkan gambaran fakta kasusnya,
ankemudian analisis forensic melakukan pencarian (searching) terhadap image
file untuk mendapatkan file atau data yang diinginkan.</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">3.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Analyzing (meneliti data)</span></b></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Setelah mendapatkan
file atau data digital yang diinginkan dari proses pemeriksaan diatas, selanjutnya
data tersebut dianalisis secara detail dan komprehensit untuk dapat membuktikan
kejahatan apa yang terjadi dan kaitannya pelaku dengan kejahatan tersebut.
Hasil analisis terhdapa data digital tadi selanjutnya disebut sebagai barang
bukti digital yang harus dapat dipertanggungjawabkan secara keilmiahan dan hukum
di depan pengadilan.</span></div>
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<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">4.<span style="font: 7.0pt "Times New Roman";">       
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Recording (mencatat data)</span></b></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-layout-grid-align: none; text-align: justify; text-autospace: none;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Melakukan pencatatan
terhadap data-data hasil temuan dan hasil analisis sehingga nantinya data
tersebut dapat dipertanggungjawabkan atau dapat direkonstruksi ulang (jika
diperlukan) atas temuan barang bukti tersebut.</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-layout-grid-align: none; text-align: justify; text-autospace: none;">
<br /></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; text-autospace: none;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">C. Prosedur
Penanganan Laporan</span></b></div>
<div class="MsoListParagraph" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-layout-grid-align: none; mso-list: l1 level2 lfo3; text-autospace: none; text-indent: -21.3pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">1.<span style="font: 7.0pt "Times New Roman";">       
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Laporan (report)</span></b></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-layout-grid-align: none; text-align: justify; text-autospace: none;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Setelah diperoleh
barang bukti digital dari proses pemeriksaan dana analisis di atas yang sesuai
dengan ivestigasi, selanjutnya data mengenai barang bukti digital tersebut
dimasukkan ke dalam laporan teknis.</span></div>
<div class="MsoListParagraph" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-layout-grid-align: none; mso-list: l1 level2 lfo3; text-autospace: none; text-indent: -18.0pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">2.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Pembungkusan dan penyegelan</span></b></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-layout-grid-align: none; text-align: justify; text-autospace: none;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Pembungkusan dan
penyegelan barang bukti : memuat proses pembungkusang dan penyegelan barang
bukti yang telah dianalisis secara digital forensic untuk diserahkan kepada pihak
lembaga yang telah mengirimnya.</span></div>
<div class="MsoListParagraph" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-layout-grid-align: none; mso-list: l1 level2 lfo3; text-autospace: none; text-indent: -18.0pt;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman";"><span style="mso-list: Ignore;">3.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Administrasi Penyerahan Laporan</span></b></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-layout-grid-align: none; text-align: justify; text-autospace: none;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Selanjutnya laporan
hasil pemeriksaan secara digital forensic berikut barang bukti eletroniknya
diserahkan kembali kepada investigator atau lembaga pengirimnya.</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 21.3pt; margin-right: 0cm; margin-top: 0cm; mso-layout-grid-align: none; text-align: justify; text-autospace: none;">
<br /></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; mso-layout-grid-align: none; text-autospace: none;">
<b><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">D. Presenting
(mempresentasikan data)</span></b></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 14.2pt; margin-right: 0cm; margin-top: 0cm; mso-layout-grid-align: none; text-align: justify; text-autospace: none;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Kegiatan yang dilakukan
penyidik untuk membeberkan hasil temuannya kepada pihak berwajib atau di
pengadilan. Biasanya presentasi data dilakukan oleh seorang ahli forensic untuk
menjelaskan hal-hal yang susah dipahami oleh kalangan umum, sehingga data-data tersebut
dapat membantu proses penyidikan untuk menemukan tersangka.</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<br /></div>
<span class="fullpost">

</span></div>

Penanganan Barang Bukti Digital Dalam Persidangan

Normal 0 false false false IN X-NONE X-NONE MicrosoftInternetExplorer4 …

15 Feb 2015

Jenis-jenis Hasing dalam proses enkripsi

<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZ1URRBWvLdPdcuNx_kgTVWYUsIveYgf0t1lpWYsuyiD3pMlv-wZOUlf-MiHSgpYcwtgMkFfgrT14560z-Kx8utOuBL8w-kDMfT1EEsGI9q2gdTNxWh_bb7D8gdWUe8DmpAGopO-iPj8iR/s1600/password.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="225" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgZ1URRBWvLdPdcuNx_kgTVWYUsIveYgf0t1lpWYsuyiD3pMlv-wZOUlf-MiHSgpYcwtgMkFfgrT14560z-Kx8utOuBL8w-kDMfT1EEsGI9q2gdTNxWh_bb7D8gdWUe8DmpAGopO-iPj8iR/s1600/password.jpg" width="400" /></a></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">Berikut ini adalah jenis-jenis tipe enkripsi dalam
sebuah kriptografi diantaranya adalah:</span></div>
<div class="MsoListParagraphCxSpFirst" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 1.0cm; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">1.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">MD4 (Message-Digest
algortihm 4)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– MD4 dibuat oleh Ronald Rivest pada Oktober 1990, MD4 adalah hash function
yang dipakai sebelum MD5, namun karena banyaknya kelemahan MD4 membuatnya
diganti oleh MD5.<br />
– panjang 16 bytes (32 karakter)<br />
– contoh : 31d6cfe0d16ae931b73c59d7e0c089c0</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 1.0cm; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">2.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">MD5 (Message-Digest
algortihm 5)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– MD5 di desain oleh Ronald Rivest pada tahun 1991 untuk menggantikan hash
function sebelumnya, MD4. Pada tahun 1996 (http://id.wikipedia.org/wiki/MD5)<br />
– digunakan di phpBB v2.x, Joomla versi dibawah 1.0.13 dan digunakan oleh
beberapa CMS dan forum<br />
– panjangnya 16 bytes (32 karakter)<br />
– contoh : c4ca4238a0b923820dcc509a6f75849b</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 1.0cm; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">3.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">MD5($pass.$salt)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– Digunakan di WB News, Joomla versi 1.0.13 dan versi diatasnya<br />
– panjang 16 bytes (32 karakter)<br />
– hash yang satu ini dimulai dari hashnya duluan kemudian dilanjutkan oleh
saltnya<br />
– contoh : 6f04f0d75f6870858bae14ac0b6d9f73</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 1.0cm; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">4.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">MD5($salt.$pass)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– Digunakan di osCommerce, AEF, Gallery dan beberapa CMS lainnya<br />
– panjang 16 bytes (32 karakter)<br />
– hash yang satu ini dimulai dari saltnya duluan kemudian dilanjutkan oleh
hashnya<br />
– contoh : f190ce9ac8445d249747cab7be43f7d</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 35.45pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">5.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">md5(md5($pass).$salt)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– Digunakan di vBulletin, IceBB dan cms lainnya<br />
– panjang 16 bytes (32 karakter)<br />
– contoh : 6011527690eddca23580955c216b1fd2</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 35.45pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">6.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">MD5(WordPress)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– Digunakan di wordpress<br />
– panjangnya 17 bytes (34 karakter)<br />
– hashnya dimulai oleh tanda $P$ kemudian dilanjutkan oleh sebuah karakter
(karakter yg paling sering dipakai adalah huruf “B”) kemudian dilanjutkan oleh
saltnya (8 karakter yg disusun secara acak, dalam contoh ini saltnya adalah
“12345678″) lalu dilanjutkan oleh hashnya<br />
– contoh : $P$B123456780BhGFYSlUqGyE6ErKErL01</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 35.45pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">7.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">MD5(phpBB3)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– Digunakan di CMS phpBB 3.x.x<br />
– panjangnya 17 bytes (34 karakter)<br />
– hashnya oleh tanda $H$ lalu dilanjutkan oleh sebuah karakter (karakter yg paling
sering dipakai adalah nomor “9″), kemudian dilanjutkan dengan saltnya (8
karakter yg disusun secara acak, dalam contoh yg saya berikan saltnya adalah
“12345678″) kemudian dilanjutkan oleh hashnya<br />
– contoh : $H$9123456785DAERgALpsri.D9z3ht120</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 35.45pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">8.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">SHA-1(Secure Hash
Algorithm)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– Diciptakan oleh National Institue of Standars and Technology atau U.S.
Federal Information Processing Standard digunakan oleh beberapa CMS dan
beberapa forum<br />
– panjangnya 20 bytes (40 karakter)<br />
– contoh : 356a192b7913b04c54574d18c28d46e6395428ab</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 35.45pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">9.<span style="font: 7.0pt "Times New Roman";">     
</span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">SHA-256(Secure Hash
Algorithm)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– hashnya dimulai oleh tanda $5$ kemudian dilanjutkan dengan saltnya (8
karakter yg disusun secara acak, dalam contoh yg saya berikan saltnya adalah
“12345678″) lalu dilanjutkan oleh karakter “$” kemudian dilanjutkan oleh
hashnya<br />
– panjang 55 karakter<br />
– contoh : $5$12345678$jBWLgeYZbSvREnuBr5s3gp13vqi…</span></div>
<div class="MsoListParagraphCxSpMiddle" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 35.45pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">10.<span style="font: 7.0pt "Times New Roman";">  </span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">SHA-512(Secure Hash Algorithm)</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– hashnya dimulai oleh tanda $6$ kemudian dilanjutkan dengan saltnya (8
karakter yg disusun secara acak, dalam contoh yg saya berikan saltnya adalah
“12345678″) lalu dilanjutkan oleh karakter “$” kemudian dilanjutkan oleh
hashnya<br />
– panjang 98 karakter<br />
– contoh : $6$12345678$U6Yv5E1lWn6mEESzKen42o6rbEm…</span></div>
<div class="MsoListParagraphCxSpLast" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; margin-left: 35.45pt; margin-right: 0cm; margin-top: 0cm; mso-add-space: auto; mso-list: l0 level1 lfo1; text-indent: -18.0pt;">
<b style="mso-bidi-font-weight: normal;"><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><span style="mso-list: Ignore;">11.<span style="font: 7.0pt "Times New Roman";">  </span></span></span></b><b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">Base64</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;"><br />
– algoritma yg berfungsi untuk encoding dan decoding suatu data ke dalam format
ASCII. panjang maksimal 64 karakter hashnya terdiri dari A..Z, a..z dan 0..9,
serta ditambah dengan dua karakter terakhir yang bersimbol yaitu + dan / serta
satu buah karakter sama dengan “=”<br />
– digunakan di beberapa forum dan CMS<br />
– contoh : Y3liZXJfY3JpbWluYWw=</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<br /></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">Situs untuk mengcrack hash</span></b><span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">:</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="color: black; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN; mso-themecolor: text1;">http://www.md5decrypter.co.uk/ => decrypt MD5<br />
http://www.md5decrypter.co.uk/sha1-decrypt.aspx => decrypt SHA1<br />
http://base64-encoder-online.waraxe.us/ => decode/encode base64<br style="mso-special-character: line-break;" />
<br style="mso-special-character: line-break;" />
</span></div>
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<br /></div>
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Jenis-jenis Hasing dalam proses enkripsi

Normal 0 false false false IN X-NONE X-NONE MicrosoftInternetExplorer4 …

15 Feb 2015

Chain Of Study

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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCGo0XshNWtRfgDWN-ee5ZdXZ2A-eLgsZhPMDUtaj9l9BorUs7ULcKRT5GpJKwtb-QS7xY_cDMk4zEeTyGSmEfjW26yi7269os3bvMmZo6lCwRHgBTHCi8V_mpG93vGlbdPWRGSF3kJ-cY/s1600/images.png" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="263" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCGo0XshNWtRfgDWN-ee5ZdXZ2A-eLgsZhPMDUtaj9l9BorUs7ULcKRT5GpJKwtb-QS7xY_cDMk4zEeTyGSmEfjW26yi7269os3bvMmZo6lCwRHgBTHCi8V_mpG93vGlbdPWRGSF3kJ-cY/s1600/images.png" width="320" /></a></div>
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<span style="color: #2a2a2a; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN;">Chain of custody dan integritas barang
bukti digital memainkan peran penting dalam aturan proses investigasi forensik,
karena fakta dari setiap tahapan forensik seorang investigator mesti mengerti
benar bagaimana bukti digital ditemukan, dikumpulkan, ditangani, dalam
berhubungan dengan barang bukti. Penanganan Chain of custody mesti menyertakan
jawaban atas semua pertanyaan terkait integritas. Jika satu pertanyaan belum
terjawab, chain of custody dapat dipertanyakan dan validasi nya dapat
terganggu. Dalam hal ini ketika menyajikan barang bukti di pengadilan, jika
satu aturan/hubungan hilang maka pengadilan akan menerima barang bukti yang
tidak relevan seluruh proses investigasi akan sia-sia. Pertanyaan paling umum
dalam presentasi bukti digital adalah “siapa, kapan, dimana dan alasan
melakukan kontak/hubungan dengan bukti digital?”. Variable yang paling sensitif
adalah “waktu melakukan kontak/hubungan” dengan bukti digital. Bukti digital bisa
saja sebuah file dengan atau tanpa ekstensi, beberapa file, sebuah partisi pada
hardisk atau keseluruhan isi hardisk, flash disk, CD/DVD/BlueRay Disk dan media
penyimpanan lainnya.</span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN;"></span></div>
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<span style="color: #2a2a2a; font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN;">Bagaimanapun pada investigasi forensik mengacu pada media penyimpanan atau
hardisk dengan tujuan penyelidikan adalah perangkat komputer. Investigator
mesti membuat identitas lengkap “bit to bit” dalam salinan file yang asli
ketika bukti digital yang asli ber-sirkulasi melalui tahapan-tahapan
investigasi, atau ketika melewati keseluruhan tahapan dari investigasi bukti
digital, staf yang menangani barak bukti akan selalu berganti, oleh sebab itu
dokumentasi tidak hanya pada perubahan tapi juga orang yang melakukan
kontak/hubungan.<br />
<br />
Chain of Custody dapat didefinisikan sebagai "Sebuah peta jalan yang
menunjukkan bagaimana bukti-bukti dikumpulkan, dianalisis, dandiawetkan dalam
rangka untuk disajikan sebagai bukti di pengadilan ". (John Vacca, P-154)
Chain of custody memegang peranan yang sangat peranan penting dalam proses
penyidikan digital. Ini adalah frase yang mengacu pada audit yang akurat dan
kontrol barang bukti asli yang berpotensi dapat digunakan untuk tujuan hukum.
Tidak cukup hanya mengetahui lokasi saat ini, namun harus ada juga <i>log </i>(sejarah
akses) yang akurat dalam melacak setiap saat pergerakan dan kepemilikan barang
bukti Penyidik harus tahu bagaimana untuk menjawab pertanyaan-pertanyaan
tertentu dalam penyelidikan forensik keseluruhan proses:<br />

1. Apa barang bukti digital ?<br />

2. Dimana bukti digital ditemukan, dikumpulkan, ditangani dan/atau diperiksa?<br />

3. Siapa saja yang berhubungan dengan barang bukti, menangani, menemukan?<br />

4. Kapan barang bukti digital ditemukan, diakses, diperiksa atau dipindahkan
(transfer).<br />

5. Bagaimana barang bukti digital digunakan.<br />
<br />
Chain of custody harus mencakup dokumentasi bagaimana data dikumpulkan,
diangkut, dianalisis, diawetkan dan ditangani (dengan membayar lisensi,
misalnya bukti Internasional).<br />
<br />
Informasi ini penting dalam memverifikasi data elektronik agar melakukan
pencegahan bila data diubah. Mempertahankan Chain of custody adalah penting
untuk orang yang melindungi data, serta otoritas dalam hukum mengadopsi Chain
of custody akan membantu penyidik untuk membuktikan bahwa bukti yang
memberatkan tidak hancur atau bukti terkontaminasi.<br />
<br />
Berikut adalah contoh dari Chain Of Custody merujuk pada report U.S Departement
of Justice menyesuaikan dengan SOP di Indonesia yaitu: </span><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%; mso-fareast-font-family: "Times New Roman"; mso-fareast-language: IN;"></span></div>
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