Securing communications sent by a first user to a second user

摘要

The invention comprises a computer-implemented method, a computer program product and a computer system wherein a first user ships an identification device such as a radio frequency identification (RFID) tag to a second user, with the aid of a trusted third party which stores and may also generate cryptographic valves for the users. The information carried on the tag can be used off-the-tag to mutual authentication of the users and key agreement between them. The invention is particularly useful in supply chain applications.