PUF-based data integrity

A system, comprising:

• a first register configured to store data at addressable locations in the first register;
• a second register configured to store data at addressable locations in the second register;
• a physically unclonable function (PUF) device including an array of PUF elements, wherein the PUF device is configured to store data in the second register and retrieve data from the second register, and the PUF device cannot access the first register;
• and
• a memory interface coupled to the first register and the PUF device, wherein the memory interface is configured to store data in the first register and retrieve data from the first register, and the memory interface cannot access the second register and the memory interface is configured to:
• store first data in the first register at a first location of the first register, and
• transmit the first data and the first location to the PUF device, wherein the PUF device is configured to:
• create a first challenge value using the first data and the first location,
• generate a first response value using the first challenge value, and
• store the first response value as a first data integrity tag in the second register, wherein the first data integrity tag is associated with the first data.

A method, comprising:

• receiving a request to store first data in a memory device, wherein the memory device is configured to store data at addressable locations in the memory device;
• storing the first data in the memory device at a first location of the memory device;
• creating a first challenge value using the first data and the first location, wherein the first challenge value indicates an address in an addressable array of PUF elements;
• transmitting the first challenge value to a PUF device to generate a first response value using the first challenge value, the first response value reflecting a response of a PUF element having the address in the addressable array of PUF elements;
• and
• storing the first response value as a first data integrity tag in the memory device, wherein the first data integrity tag is associated with the first data.