Systems and Methods for Maintaining Integrity and Secrecy in Untrusted Computing Platforms

A method for operating a computing system with a trusted processor include generating a secret cryptographic key based on a physically unclonable function in at least one hardware component in the trusted processor, generating a first public key and first private key using first secret cryptographic key, and executing instruction code corresponding to a first software program. The method further includes generating output data with the trusted processor during execution of the first software program, generating encrypted data corresponding to the output data using the first public key for at least a portion of the encryption, generating a signature of the encrypted data, and transmitting with an input/output (I/O) interface operatively connected to the trusted processor the encrypted data and the signature for storage in an untrusted memory.