Grsecurity is a project for Linux which institutes several computer security enhancements, including Mandatory access control, randomization of key local and network informational data, /proc and Chroot() jail restrictions, network socket control, capabilities control, and extra auditing functions. The grsecurity patch is based on a vanilla Linux kernel and includes the PaX patch set. Creator and lead developer of grsecurity is Brad Spengler aka. Spender.

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