Difference between pages "Write Blockers" and "Cell phone forensics bibliography"

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'''Write blockers''' are devices that allow acquisition of information on a [[hard drive|drive]] without creating the possibility of accidentally damaging the drive contents. They do this by allowing read commands to pass but by blocking write commands, hence their name.
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==Academic Publications==
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; [http://www.waset.org/pwaset/v26/v26-6.pdf Data Acquisition from Cell Phone using Logical Approach], Keonwoo Kim, Dowon Hong, Kyoil Chung, and Jae-Cheol Ryou, PROCEEDINGS OF WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY VOLUME 26 DECEMBER 2007 ISSN 1307-6884
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: This article discusses three approaches for acquiring data from cell phones: physically removing the flash RAM chips and reading them directly; reading the data out using the [[JTAG]] interface, and running software on the cell phone to extract the files at a logical level. The authors have built a logical extraction system and are working on a system based on JTAG.
  
There are two ways to build a write-blocker: the blocker can allow all commands to pass from the computer to the drive except for those that are on a particular list. Alternatively, the blocker can specifically block the write commands and let everything else through.
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; [http://portal.acm.org/citation.cfm?id=1363257 Forensics for Korean cell phone], Keonwoo Kim, Dowon Hong and Kyoil Chung, Proceedings of the 1st international conference on Forensic applications and techniques in telecommunications, information, and multimedia and workshop, Adelaide, Australia, 2008.
  
Write blockers may also include drive protection which will limit the speed of a drive attached to the blocker. Drives that run at higher speed work harder(the head moves back and forth more often due to read errors). This added protection could allow drives that can not be read at high speed (UDMA modes) to be read at the slower modes (PIO).  
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; [http://www.ssddfj.org/papers/SSDDFJ_V2_1_Luck_Stokes.pdf An Integrated Approach to Recovering Deleted Files from NAND Flash Data], James Luck & Mark Stokes, SMALL SCALE DIGITAL DEVICE FORENSICS JOURNAL, VOL. 2, NO. 1, JUNE 2008 ISSN# 1941-6164
  
There are two types of write blockers, Native and Tailgate. A Native device uses the same interface on for both in and out, for example a IDE to IDE write block. A Tailgate device uses one interface for one side and a different one for the other, for example a Firewire to SATA write block.  
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==US Government Publications==
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; [http://csrc.nist.gov/publications/nistpubs/800-101/SP800-101.pdf Guidelines on Cell Phone Forensics] (NIST SP 800-101), May 2007
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; [http://csrc.nist.gov/publications/nistir/nistir-7250.pdf Cell Phone Forensic Tools: An Overview and Analysis] (NISTIR 7250)
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; [http://csrc.nist.gov/publications/nistir/nistir-7100-PDAForensics.pdf PDA Forensic Tools: An Overview and Analysis] (NISTIR 7100)
  
Steve Bress and Mark Menz invented hard drive write blocking (US Patent 6,813,682).
 
  
There are both hardware and software write blockers. Some software write blockers are designed for a specific operating system. One designed for Windows will not work on Linux. Most hardware write blockers are software independent.
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[[Category:Bibliography]]
 
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= Hardware Write Blockers =
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== Commercial ==
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'''Hardware write blockers''' can be either [[IDE]]-to-IDE or [[Firewire]]/[[USB]]-to-IDE. Simson prefers the IDE-to-IDE because they deal better with errors on the drive and make it easier to access special information that is only accessible over the IDE interface. You may feel differently.
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NIST test results are here: http://www.nist.gov/itl/ssd/cs/cftt/cftt-hardware-write-block.cfm
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; [[ICS Drive Lock]]
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: http://www.ics-iq.com/Super-DriveLock-Write-Blocker-Write-Protector-p/f.gr-0028-0000.htm
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; MyKey Technology, Inc. NoWrite FPU and FlashBlock II
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: 1.8"/2.5"/3.5"/ IDE to IDE, FireWire/USB to IDE & SATA, all media types - NIST Ver. 2 accepted 
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: http://www.mykeytech.com/
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; [[Tableau]] write blockers for IDE, SATA, SCSI, USB  NIST Ver. 1 accepted
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: http://www.tableau.com/index.php?pageid=products
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; WiebeTech write-blockers for almost any disk drive: 2.5"/3.5" IDE, SCSI, SATA, ...
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: http://wiebetech.com/home.php?home=5  NIST Ver. 1 accepted
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= Software Write Blockers =
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'''Software write blockers''' can be either tailored to an individual operating system or can be an independent boot disk. Their main upsides are with ease of use, since they are on a CD and do not require you to open up the case, and speed since they do not become a bottle neck.
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== Commercial ==
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; [[SAFE Block XP]]
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: SAFE Block XP is a software-based write blocker designed for the Windows XP Operating System. It comes in both 32 and 64 bit options. NIST Ver. 1.2 accepted
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: http://www.forensicsoft.com/
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; [[MacForensicsLab Write Controller]]
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: MacForensicsLab Write Controller is a software-based write blocker designed for the Mac OS X operating system.  It runs on both 32 and 64 bit versions of Mac OS X 10.4 or later.
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: http://www.macforensicslab.com/ProductsAndServices/index.php?main_page=product_info&cPath=1&products_id=339
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[[Category:Disk Imaging]]
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Revision as of 19:17, 12 November 2008

Academic Publications

Data Acquisition from Cell Phone using Logical Approach, Keonwoo Kim, Dowon Hong, Kyoil Chung, and Jae-Cheol Ryou, PROCEEDINGS OF WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY VOLUME 26 DECEMBER 2007 ISSN 1307-6884
This article discusses three approaches for acquiring data from cell phones: physically removing the flash RAM chips and reading them directly; reading the data out using the JTAG interface, and running software on the cell phone to extract the files at a logical level. The authors have built a logical extraction system and are working on a system based on JTAG.
Forensics for Korean cell phone, Keonwoo Kim, Dowon Hong and Kyoil Chung, Proceedings of the 1st international conference on Forensic applications and techniques in telecommunications, information, and multimedia and workshop, Adelaide, Australia, 2008.
An Integrated Approach to Recovering Deleted Files from NAND Flash Data, James Luck & Mark Stokes, SMALL SCALE DIGITAL DEVICE FORENSICS JOURNAL, VOL. 2, NO. 1, JUNE 2008 ISSN# 1941-6164

US Government Publications

Guidelines on Cell Phone Forensics (NIST SP 800-101), May 2007
Cell Phone Forensic Tools: An Overview and Analysis (NISTIR 7250)
PDA Forensic Tools: An Overview and Analysis (NISTIR 7100)