From Fedora Project Wiki
Security
This section highlights various security items from Fedora.
Fingerprint Readers
Fingerprint readers are now better integrated with Fedora 11. Gnome users can easily setup fingerprint authentication using gnome-about-me, and will allow the ability to login from both 
gdm
DNSSEC
DNSSEC (DNS SECurity) is mechanism which provides integrity and authenticity of DNS data.
SHA-2 support
TBD: application-specific notes about SHA-2 will go here. See Features/StrongerHashes#Release_Notes and Hash_algorithm_migration_status#Configuration.