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CPU to fend off virus, worm attacks on XP, XP Embedded
May 17, 2004

In conjunction with the Execution Protection feature in Microsoft's forthcoming Service Pack 2 (SP2) upgrade to Windows XP, Transmeta has announced plans to add hardware support for the required "No Execute" function to its Efficeon processors. Execution Protection (commonly known as "NX") invokes hardware extensions that are intended to guard against many of the most common types of virus and worm attacks.

Some of the most devastating attacks, such as the recent Sasser worm and last year's Blaster and Welchia worms, as well as many other malicious programs, attack computers by attempting to insert and execute code from data regions. To counter this growing threat of malicious virus and worm attacks over the Internet, Microsoft is adding the Execution Protection feature to Windows XP SP2. The feature leverages the processor's NX support to stop malicious code immediately if it attempts to execute -- but it can only be enabled on systems in which the processor offers the required NX support.

Transmeta claims that its Efficeon processor will be the first "energy-efficient processor" to provide support for Windows XP's new "No Execute" capability, and that the NX capability will be a standard feature the Efficeon by mid-year 2004. In the mean time, the company says it is providing advanced versions of Efficeon-based systems which include NX support to Microsoft this month for internal evaluation and use.

According to Microsoft, the SP2 update for Windows XP is currently slated to ship in the "Summer 2004 timeframe." SP2 for Windows XP Embedded, which will include support for the new Execution Protection feature as well as other security enhancements, will ship "shortly thereafter."

A detailed description of Execution Prevention is available from this paper at Microsoft TechNet.



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