LOMAC is a Linux extension that implements a low watermark security policy based on Biba's model. It deals with the arrival of malicious code from the Internet by downgrading daemons that receive incoming traffic, so that even if they are compromised, they will not be able to write to any high integrity parts of the system.

References

• http://opensource.nailabs.com/lomac/
• Security Engineering, Ross Anderson (ISBN 0-471-38922-6)
• http://freshmeat.net/projects/lomac