By Martin S. Olivier, Sujeet Shenoi

Electronic forensics bargains with the purchase, renovation, exam, research and presentation of digital facts. virtually each crime now includes a few electronic facts; electronic forensics presents the options and instruments to articulate this facts. This e-book describes unique study effects and leading edge purposes within the rising self-discipline of electronic forensics. additionally, it highlights a number of the significant technical and criminal matters concerning electronic proof and digital crime investigations.

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Additional resources for Advances in Digital Forensics II (IFIP Advances in Information and Communication Technology) (v. 2)

Example text

7 GHz Thinkpad with 512 MB of RAM. Under Linux, with direct access to the DEB file system, the overhead is approximately 9%. Over a Samba mount, FTK showed about 23% overhead, but further investigation indicated that the Windows XP platform running FTK was issuing two parallel, non-overlapping sequences of read operations through Samba, even when application accesses were strictly sequential. Running the Scalpel file carver under Windows over Samba to access a DEB-enabled file system showed similar overhead (approximately 25%; this result is not shown in the tables).

The paper addresses an urgent need for digital-forensics-aware operating system components that can enhance the consistency, security and performance of investigations. Keywords: Operating system internals, file systems, digital evidence bags 1. , file systems and caching mechanisms. , protection of digital evidence from unauthorized access or tampering), and consistency. This paper considers the advantages and design challenges of digital-forensics-aware file systems. Specifically, it examines how auditing ofdigital evidence is currently handled and how an enhanced file system can make this process more automated and more accurate.

Some of the advantages of DEBs can be realized even for current DEB-unaware tools: a DEB-enabled file system can transparently offer a DEB's contents to such tools while automatically updating the DEB's metadata and audit log. Another advantage, even for DEB-enabled tools, is that the code for accessing a DEB, including introducing and removing items from the bag and updating the audit log and metadata, needs to be certified only once. Finally, a standard API for accessing DEBs greatly reduces the effort in involved adding DEB support to current and future applications.

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