Bibliography 

LSM (Linux Security Module) http://lsm.immunix.org/
SELinux http://www.nsa.gov/selinux/ 
LIDS http://www.lids.org/
RSBAC http://www.rsbac.de/
Medusa http://medusa.terminus.sk/
Lomac http://freshmeat.net/projects/lomac
Linux ACL http://acl.bestbits.at/
Syscalltrak http://syscalltrak.sf.net/