You can find the Cisco IDS Signature Appendix online at http://www.cisco.com/en/US/partner/products/sw/secure/ps2113/products_installation_and_configuration_guide_chapter09186a008014a214.html#/wp803372.
More information on the algorithms used by Cisco IDS signatures appears online at http://www.cisco.com/warp/public/cc/pd/sqsw/sqidsz/prodlit/idssa_wp.htm.