SECURE COMMUNICATION BETWEEN A SOURCE TO MULTIPLE TARGETS

A method for secure communication, the method includes (a) receiving, by a first entity executable by a first circuit, challenges of second entities, the second entities are executable by second circuits; (b) generating a pair of asymmetrical keys, the pair includes a new public key and a new private key; (c) generating a response message that includes a representation of the challenges of the second entities and the new public key, wherein the response message is signed by the first entity; (d) sending the response message to the second entities; (e) for each second entity (e.1) determining a unique symmetrical key associated with the second entity; wherein the determining is based on the new private key and a verified public key of the second entity; and (e.2) securely communicating with the second entity using the unique symmetrical key associated with the second entity.