If you attempt to write data to the blocked drive an

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If you attempt to write data to the blocked drive, an alarm sounds, advising that no writes have occurred. With hardware write-blockers, you can connect the evidence drive to your workstation and start the OS as usual. Hardware write-blockers are ideal for GUI forensics tools. They prevent Windows or Linux from writing data to the blocked drive. Hardware write-blockers act as a bridge between the suspect drive and the forensic workstation
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Many vendors have developed write- blocking devices that connect to a computer through FireWire, USB 2.0, SATA, and SCSI controllers. Most of these write-blockers enable you to remove and reconnect drives without having to shut down your workstation, which saves time in processing the evidence drive.
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Validating and Testing Forensics Software Using National Institute of Standards and Technology (NIST) Tools :NIST has created criteria for testing computer forensics tools, which are included in the articlen“General Test Methodology for Computer Forensic Tools”. Testing Standards: Establish categories for computer forensics tools Identify computer forensics category requirements Develop test assertions Identify test cases Establish a test method Report test result
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Using Validation Protocols After retrieving and examining evidence data with one tool, you should verify your results by performing the same tasks with other similar forensics tools. For example, after you use one forensics tool to retrieve disk data, you use another to see whether you retrieve the same information. Although this step might seem unnecessary, you might be asked on the witness stand “How did you verify your results?” To satisfy the need for verification, you need at least two tools to validate software or hardware upgrades. The tool you use to validate the results should be well tested and documented.
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Computer Forensics Examination Protocol 1.First, conduct your investigation of the digital evidence with one GUI tool. 2.Then perform the same investigation with a disk editor to verify that the GUI tool is seeing the same digital evidence in the same places on the test or suspect drive’s image. 3.If a file is recovered, obtain the hash value with the GUI tool and the disk editor, and then compare the results to verify whether the file has the same value in both tools.
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Computer Forensics Tool Upgrade Protocol In addition to verifying your results by using two disk-analysis tools, you should test all new releases and OS patches and upgrades to make sure they’re reliable and don’t corrupt evidence data. New releases and OS upgrades and patches can affect the way your forensics tools perform.
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Computer Forensics Tool Upgrade Protocol In addition to verifying your results by using two disk-analysis tools, you should test all new releases and OS patches and upgrades to make sure they’re reliable and don’t corrupt evidence data. New releases and OS upgrades and patches can affect the way your forensics tools perform.
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  • Fall '19
  • Computer Forensics

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