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Microsoft offers Palladium details

Palladium will create a “trusted space” within a PC where certain applications and operations can run, and will require a security chip and rewritten software designed to take advantage of the chip. Because the “trusted space” will be separate from Windows, Palladium should be able to better protect sensitive information and stop the spread of viruses and the like, according to Microsoft. The system will also allow users to create documents that expire after a certain amount of time or that are limited in how they can be shared, Microsoft has said. Full Story