Patent ID: 8024573
Filing Date: 2011-09-20
Classification: H04L,H04W

Abstract:
1. A method for authentication of elements of a group, wherein the group has a hardware leading element with which each of the group elements can exchange information and wherein the authentication of the group elements takes place with regard to the leading element, the method comprising: the leading element broadcasting an authentication request together with a service request (SREQ) to all the group elements, wherein the authentication request is the same for all the group elements; and the group elements each sending authentication responses to the leading element based on the authentication request in such a way that the leading element receives a time-synchronized or event-synchronized authentication of all the group elements, wherein the authentication responses are different for each group element, wherein during an initialization phase before a first authentication request, a shared hash function h( ) is defined, each group element N each group element N the group elements N the leading element stores the computed values of n wherein the leading element defines an integer j with j being smaller than the smallest number of iterations I the leading element sends the integer j as a shared group challenge to all the group elements N every group element N each group element N