Method and system for the exchange of digitally signed objects over an insecure network

Method and system aspects for authenticated communication of messages among computer systems in an insecure network are described. These aspects include building a first signed object message in a first computer system, the first signed object message including a first sequence number, a first object and a first signature. Further included is sending the first signed object message to a second computer system, verifying the first signed object message in the second computer,system, and building a second signed object message in the second computer system for replying to the first computer system when the first signed object message is verified, the second signed object message including a second sequence number, a second object, and a second signature.