A method for access control of a group of persons by means of multiple readers and multiple token

The invention relates to a method for access control of a group of persons by means of several readers and a plurality of tokens, wherein the method for access control comprising an authenticating a token through one of the readers, wherein the reader is coupled with the token, wherein authenticating comprises the steps of: Detecting by the reader that the token is in a wireless communication range of the reader, Sending the identification number of the reader and a first value of the reading device to the token, wherein the first value comprises a random number, Identifying the reading apparatus with which the token is paired by the token by comparing the identification number of the reader with the data stored in the non-volatile internal memory of the token identification numbers of the readers transmitted to the token, wherein said return value comprises encrypted generate a return value token by the first value, Send the return value from the token to the reader, Identifying the token by the reading device based on the return value by the processor of the reader, Actuating a locking means by the reading device.