METHOD TO GENERATE A CRYPTOGRAPHIC KEY TO PROTECT COMMUNICATION BETWEEN TWO ENTITIES, LEGIBLE STORAGE BY COMPUTER, DEVICE ADAPTED TO GENERATE A CRYPTOGRAPHIC KEY FOR A COMMUNICATIONS ENTITY, USER EQUIPMENT, AND, SYSTEM

摘要

method for generating a cryptographic key to protect communication between two entities, computer program product, device adapted to generate a cryptographic key for a communications entity, user equipment, and system. a technique for generating a cryptographic key (120) is provided. the technique is particularly useful for protecting communication between two entities (202,302,204,304) by cooperatively running a distributed security operation. the technique includes providing at least two parameters (106, 108), the first parameter (106) including or derived from some cryptographic keys (110,112) that were computed by the first entity (202,302) running the security operation and the second parameter (108 ) including or deriving from a pass (116) having a different value each time the security operation (114) is initiated by the second entity (204,304) for the first entity (202,302). a key derivation function is applied to the parameters provided (106,108) to generate the desired cryptographic key (120).