Secure element and method for mutually authenticating a secure element with a network entity

A method of mutually authenticating a secure element with an external entity, the method comprising:

• initiating a secure channel;
• generating at least one shared secret by executing an elliptic curve key agreement based on the static key pair;
• generating at least one session key for secure messaging over the secure channel based on the at least one shared secret and shared information, wherein the shared information includes the receipt;
• determining a new receipt based on one of the at least one session key;
• and
• storing the new receipt in the storage unit.

A non-transitory, computer-readable medium storing encrypted computer-readable instructions that, when decrypted and executed by a control unit of a secure element cause the control unit of the secure element to:

• initiate a secure channel;
• generate at least one shared secret by executing an elliptic curve key agreement based on the static key pair;
• generate at least one session key for secure messaging over the secure channel based on the at least one shared secret and shared information, wherein the shared information includes the receipt;
• determine a new receipt based on one of the at least one session key;
• and
• store the new receipt in the storage unit.