Abstract: A method for transmission continuation control includes establishing a physical transmission link between a first entity and a second entity, and transmitting a first user message from one of the first and second entities to the other of the first and second entities. The method also includes executing a continuation protocol between the first entity and the second entity while maintaining the physical transmission link. The method further includes transmitting a second user message from one of the first and second entities to the other of the first and second entities, and terminating the physical transmission link between the first entity and the second entity after the transmission of the second user message.

Abstract: A method and apparatus for a unique digital signature is provided. According to one aspect of the invention, a unique digital signature comprises an adapted digital signature and a service id. The adapted digital signature provides temporary or restricted privileges for a particular electronic service. In one embodiment, the electronic service is electronic message forwarding. In another embodiment, the electronic service is electronic media delivery. An authentication log file is maintained for recording status information concerning unique digital signatures.