Secure processor arrangement having shared memory

A processor arrangement, comprising:

• a first processor;
• a second processor;
• and
• at least one memory configured to be shared by the first processor and the second processor;
• wherein the second processor comprises:
• a memory interface configured to provide access to the at least one memory;
• and
• a processor communication interface configured to provide a memory access service to the first processor,
• wherein the first processor comprises a processor communication interface configured to use the memory access service from the second processor, and
• wherein the first processor and the second processor use at least one cryptographic mechanism in the context of the memory access service.

A processor, comprising:

• a memory interface configured to provide access to at least one memory;
• and
• a processor communication interface configured to provide a memory access service to another processor,
• wherein the processor uses at least one cryptographic mechanism in the context of the memory access service for authenticating the other processor.

A processor arrangement, comprising:

• a trusted first processor;
• a first processor secret key assigned to the first processor;
• a second processor configured to be operable in a trusted mode and in a non-trusted mode;
• a second processor secret key assigned to the second processor;
• and
• at least one memory configured to be shared by the first processor and the second processor,
• wherein the second processor comprises:
• a memory interface configured to provide access to the at least one memory;
• and
• a processor communication interface configured to provide a memory access service to the first processor,
• wherein the first processor comprises a processor communication interface configured to use the memory access service from the second processor, and
• wherein the first processor and the second processor are configured to use at least one cryptographic mechanism in the context of the memory access service, the first processor using the first processor secret key and the second processor using the second processor secret key when operated in the trusted mode.

A communication device, comprising:

• a processor arrangement comprising:
• a first processor;
• a second processor;
• and
• at least one memory configured to be shared by the first processor and the second processor,
• wherein the second processor comprises:
• a memory interface configured to provide access to the at least one memory;
• and
• a processor communication interface configured to provide a memory access service to the first processor,
• wherein the first processor comprises a processor communication interface configured to use the memory access service from the second processor, and
• wherein the first processor and the second processor use at least one cryptographic mechanism in the context of the memory access service.

A method of operating a processor arrangement, the method comprising:

• generating a first request for a memory access service to access a memory that is shared by a first processor and a second processor;
• transmitting the first request from the first processor to the second processor;
• the second processor processing the first request using at least one cryptographic mechanism;
• generating a second request for the memory access service to access the memory in accordance with the first request;
• transmitting the second request from the second processor to the memory;
• and
• executing the second request by the memory.