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<b><i>Product Review:</b></i> Wave Software Enhances Its Trident Suite

By Jason Park
March 25, 2008
Wave Software's Trident is an electronic data discovery application that comes in a free 'Lite' version and the more extensive 'Pro' version. The latter gives the electronic discovery professional a number of data processing options that are built for speed and accuracy. Trident gives users the ability to de-duplicate, filter and cull mailstores, output true PST and NSF files, de-NIST loose files and separate ubiquitous operating system files from user-created content.

The upgrades seen with version 4.5 (or the third prong of the Trident) include the 'loose file' handling capability that many electronic discovery professionals have been requesting. Loose files are the Microsoft Office, PDF, or other files that users create and store within folders on their computers, network shared folders, external storage devices and so on. Loose files exist outside of a traditional mailstore container (like an Outlook PST or Lotus Notes NSF file) and may be placed anywhere on the storage medium at the discretion of the user. From the electronic discovery processing professional's point of view, separating the user-generated content from the standard (and oftentimes ignorable) operating system files can be a difficult and time-consuming task.

Trident Pro's version 4.5 offers de-NISTing and new de-duplicating features. Let's talk about de-NISTing. What is it? De-NISTing is the process whereby an application uses published hash sets to identify system files and other ignorable files. Why is de-NISTing important? More frequently these days, entire hard drives are being forensically collected, preserved and processed. While this approach is a good one because it preserves all the data as it existed during the regular course of business and at a specific period in time, it also preserves all the operating system files. With operating system and other ignorable files often taking up approximately 65%-85% of a hard drive's active data, it is essential to identify and exclude these ignorable files as early into the process as is feasible. The National Institute of Standards and Technology ('NIST') publishes a quarterly update of known system and ignorable file hashes. This quarterly update is the product of the National Software Reference Library ('NSRL') and is freely downloadable from www. nsrl.nist.gov/Downloads.htm. So, why not just tell your electronic discovery vendor to ignore files with a .dll or .exe or other system file extension? It is very easy for a user to hide data by changing the file extension of an incriminating document to .dll or .exe and storing it in a program folder. Unfortunately, in an attempt to save time and money, these system file or program file folders are ignored. Trident Pro version 4.5 now allows the electronic discovery professional to defensibly exclude files based upon MD5 and SHA hashes of known system files, which are published by the NIST.

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