Ther, was this awsome passkey I saw recently that you could only use by uploading programs to it (vs. using the TPM API), and then that program's hash would occ

Ther, was this awsome passkey I saw recently that you could only use by uploading programs to it (vs. using the TPM API), and then that program's hash would occupy a PCR slot. This would allow minimal protocols, specialized to their use cases, with updatable API's-- but I'm blanking on the name!