Message authentication with secure code verification

A non-transitory computer-readable storage medium having instructions stored thereon which, when executed by one or more processors, cause the one or more processors to perform operations comprising:

• accessing a property of a code, the code being stored within a client device;
• verifying correctness of the property of the code based on information associated with the code and stored within a security device in order to determine that the code is an authorized code;
• in response to determining that the code is the authorized code, accessing data stored within the security device;
• and
• generating a property of a message based on the data.

A method comprising:

• receiving, at a security device, a property of code from a client device, the code being stored within the client device;
• verifying, by the security device, correctness of the property of the code based on information associated with the code and stored within the security device to determine that the code is an authorized code;
• and
• in response to determining that the code is the authorized code, enabling the security device to access data stored within the security device;
• and
• generating, by the security device, a property of a message based on the data.