I came across these little nuggets while browsing GotDotNet, courtesy of the CLR Team.

  • Security Policy Best Practices [1]

    The .Net Framework provides a code access security model that allows administrators to modify security policy to meet their individual needs. While code access security generally increases the reliability and security of applications, improperly administering code access security policy can potentially create security weaknesses. This document explains basic administration concepts and describes the best practices to use when administering code access security policy.

  • .Net Framework Cryptography Frequently Asked Questions [2]

    The .Net Framework contains a rich set of cryptography resources. This document answers some of the questions commonly asked about these resources

  • Source code of the cryptography base classes shipping in the .Net Framework [3]

[1] http://www.gotdotnet.com/team/clr/SecurityPolicyBestPractices.htm
[2] http://www.gotdotnet.com/team/clr/cryptofaq.htm
[3] http://www.gotdotnet.com/team/clr/samples/eula_clr_cryptosrc.aspx

The third one looks especially interesting!