Patent ID: 7353392
Filing Date: 2008-04-01
Classification: G06Q,G07F

Abstract:
1. A method for mutual authentication of a first data processing unit and of a second data processing unit, based on the challenge and response method, which comprises the steps of: producing a first bit string in the first data processing unit; transmitting the first bit string to the second data processing unit; producing a second bit string and a third bit string from the first bit string and from first data using a first algorithm in the second data processing unit; transmitting the second bit string to the first data processing unit; producing a first authentication result and a fourth bit string from the first bit string, from the second bit string and from second data using a second algorithm in the first data processing unit; producing a fifth bit string from the fourth bit string and from third data using a third algorithm in the first data processing unit; transmitting the fifth bit string to the second data processing unit; and producing a second authentication result from the third bit string, from the fifth bit string and from fourth data using a fourth algorithm in the second data processing unit.