Patent ID: 7213149
Filing Date: 2007-05-01
Classification: H04L

Abstract:
1. A method for the authenticated transmission of messages, comprising the following communication setup steps: generating a login key by a keyed-hashing method on the basis of random data, temporal validity information, and a private key; transmitting the login key from an originator to a destination; and verifying the authenticity and the temporal validity of the login key on the basis of the keyed hashing digest on the destination side; and comprising the following acknowledgement steps: generating an acknowledgement by a keyed-hashing method on the basis of second random data and the private key, wherein the acknowledgement key includes a time stamp; transmitting the acknowledgement key from the destination to the originator; and verifying the acknowledgement key by the originator, including checking the acknowledgement key on the basis of the time stamp and the previously stored temporal validity information whether the acknowledgement key is still valid, wherein the keyed-hashing technique uses random data that is stored by the destination in a table during the temporal validity of the login key.