How can I crypt?

• application/library built-in crypt (SSL private key, firefox personal security manager, ssh-agent)

• Third party crypto (gpg)

• Filesystems that support encryption (quite few, and it locks you out of your favourite existing filesystem)

• Overlay encryption

• • encfs: http://arg0.net/wiki/encfs/intro2
  • ecryptfs: http://ecryptfs.sourceforge.net/

• Block level encryption