Abstract: A method for authenticating by a network server a communication apparatus, the communication apparatus contains a tamper resistant area adapted to memorize a first secret, by receiving from the communication apparatus a request message including a subscriber identifier; providing, by consulting a database accessible by the network server, a device identifier associated to the received subscriber identifier allowing to identify the communication apparatus; identifying in a secure distributed ledger a record published by a manufacturer of at least a portion of the communication apparatus, the record including a second secret attributed to the identified communication apparatus; generating a challenge message including a random number and sending it to the communication apparatus for it to generate a first result; receiving from the communication apparatus a response message including the first result, the communication apparatus being authenticated by the network server if the first result is equal to a second

Abstract: A method for authenticating by a network server a communication apparatus, the communication apparatus contains a tamper resistant area adapted to memorize a first secret, by receiving from the communication apparatus a request message including a subscriber identifier; providing, by consulting a database accessible by the network server, a device identifier associated to the received subscriber identifier allowing to identify the communication apparatus; identifying in a secure distributed ledger, using the device identifier, a record published by a manufacturer of at least a portion of the communication apparatus, said record comprising a second secret attributed to the identified communication apparatus; generating a challenge message comprising a random number RAND and sending it to the communication apparatus for it to generate a first result F_HWRES; receiving from the communication apparatus a response message comprising the first result F_HWRES, the communication apparatus being authenticated by the n

Abstract: A method for building a predefined secret value allocated to a first pod belonging to a node of a system having a second pod. The system includes a first storage area whose access is restricted to the node and a second storage area whose access is restricted to the second pod. The second pod retrieves a first value stored in a third storage area and a second value stored in the second storage area, and computes a third value by applying a first function to the first and second values. The second pod retrieves a fourth value stored in the first storage area and computes a fifth value by applying a second function to the third and fourth values. The first pod retrieves a sixth value stored in the first pod and computes the predefined secret value by applying a third function to the fifth and sixth values.