[JDEV] security

[chetan s ithal]

hi all ,
           We are developing an Instant Messaging client using Jabber
Server . To provide some bare minimum security , we will be encrypting
the messages at the client side using some standard algorithm and the
message will decrypted using the same key. Does Jabber support this kind
of security feature ? or Is there any other alternative to this ?
thanks ,
chetan s ithal .