By IT Governance Publishing
This pocket consultant illustrates the technical complexities desirous about laptop forensics, and exhibits managers what makes the self-discipline proper to their supplier. For technical employees, the e-book deals a useful perception into the major procedures and approaches which are required.
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Extra resources for Computer Forensics A Pocket Guide
Gov 39 4: Forensic Analysis of Data • • • Obtain information from the Software Vendor on the structure and format of the file. View the file in hexadecimal and translate the contents. Install the application on a forensics machine. Extract the file of interest and use the application to view the file contents. Use an inbuilt viewer within the forensics tool to view the file. For common applications such as web browsers, email clients and image viewers, commercial forensic tools contain an inbuilt viewer to view the proprietary files.
A primary tool for the investigator is being able to search through the drive for keywords or file types. If you are looking for images, you can perform a search to find all jpeg or bitmap images, etc. A very simply hiding technique used by novice computer users is to modify the file extension to something else in order to avoid such searches. However, most commercially available tools such as EnCase® and FTK®, are able to verify the signature of the files to ensure the file extension matches the file header.
File slack is one reason why bit-for-bit duplication of drives is useful to the examiner. File slack is an area of memory on the drive that can contain valuable information from deleted files. In order to understand file slack, some hard drive and operating system details are required. The smallest area of memory on a hard drive is referred to as a sector. In Windows®, a sector is typically 512 bytes. Sectors are then grouped into clusters, with a cluster having 1–128 sectors. From a file system perspective, the smallest data area that is indexed are clusters.
Computer Forensics A Pocket Guide by IT Governance Publishing