3DES Tripple DES is much more secure than normal DES AES AES is one of the crypto algorithms used by Halon, it may also be known as RIJNDAEL Automatic IPSec Automatic IPSec is a way to secure the transfer of tcp/ip packet between two computers using a predefined key, then on both sides there will be a service that will maintain and update the crypto keys, see IPSec, Manual IPSec and Mobile IPSec..