Patent ID: 8787569
Filing Date: 2014-07-22
Classification: G06F,G06Q,G07F,H04L

Abstract:
1. A method for securing communication of components inside a self-service automat that are connected to each other by a bus system, with a transmitter and a receiver, comprising: exchanging data as tuples (C, A, R, N, Z) between the transmitter and the receiver on a transport layer of the bus system, wherein determining while transmitting from the transmitter to the receiver, whether Z is less than a maximum session number Z determining whether N is less than a maximum message number N comparing a tuple ({circumflex over (Z)},{circumflex over (N)}) to a tuple ( generating, based on the comparing, an error if more than Δ messages have been lost: decrypting message data, based on the comparing, if not more than Δ messages have been lost; upon decrypting the message data, authenticating the message data; decrypting the message data based on a K comparing A to an authentication value A′ at the receiver, wherein A′ is determined based on K authenticating the decrypted message data, based on the comparing of A to A′, if A is equal to A′.