A method and apparatus for refreshing a shared secret, in particular a symmetric cryptographic key, between a first node and a second node of a communication system

摘要

A method (20) for updating a first secret shared between a first node and a second node of a communication system, characterized by the following features: the first node recognizes a predetermined trigger event (21), the first node wins (22 ) together with the second node a secret bit sequence, - the first node combines (23) the first secret with the bit sequence to a second secret and - the first node replaces (24) the first secret with the second secret.