Authentication for enciphered communication

Abstract

Abstract The invention relates to a method for cipher distribution in an open communications system with authentication of the subscriber stations, in which a secret random value is in each case selected in the subscriber station and, after input into a one-way function, is signed as official cipher information by a signing centre, in which, in the centre, two signature parameters are in each case formed for the public cipher information for the subscriber station similar to the signature according to El Gamal, in which the signature parameters, together with the public cipher information items and the identifications are exchanged for the purpose of communication between the subscriber stations, in which the identities of the subscriber stations can be verified via the signature parameters, and in which the subscriber stations in each case calculate from the public cipher information items and their own secret random values a common secret cipher via a further one-way function in accordance with the method according to Diffie and Hellmann. <IMAGE>

Inventors

• 👤 Hans-Joachim Hitz

Bibliographic Details