20 useful IT security Web sites By Jon Brodkin

Liquidmatrix Security Digest: Liquidmatrix is a labor of love for Dave Lewis, a security professional who has run the site since 1998 while working in the financial, military, government and health care industries. Lewis aggregates security news and information, and is nothing if not prolific. In one recent two-day stretch, he posted 10 blog items covering Trojan attacks launched against pro-Tibetan groups, Google's "family safety guide," and vulnerabilities in Cisco and Microsoft products.