Systems and methods for managing state

A method for managing program state information associated with a protected software function performed by a computing system comprising secure hardware, a processor, and a non-transitory computer-readable medium storing instructions that, when executed by the processor, cause the computing system to perform the method, the method comprising:

• receiving software function inputs;
• receiving encrypted initial program state information;
• retrieving a previous secure tag and a current secure tag associated with the encrypted initial program state information from a protected memory register of the secure hardware;
• decrypting the encrypted initial program state information using a fixed key to generate decrypted initial program state information and a third secure tag;
• determining that the previous secure tag and the third secure tag match;
• and
• based on determining that the previous secure tag and the third secure tag match, executing the protected software function using, at least in part, the software function inputs and the decrypted initial program state information to generate updated program state information.