Secure cryptographic server card

Abstract

A crypto expansion card including a computer interface, a secure computing enclave having a secure microcontroller unit running smart contracts. The computer interface can couple the computer expansion card to a computing device. The secure computing enclave may be coupled to the computer interface. The secure computing enclave includes a secured micro controller unit configured to run smart contacts by: receiving a cryptographic request via the computer interface, verifying the cryptographic request is properly signed and processing the verified cryptographic request. The processing of the verified cryptographic request includes using a private cryptographic security key. The processing of the verified cryptographic request on the secure micro controller unit may include using the private cryptographic security key to generate a cryptographic signature that may be part of a multi signature address. The crypto expansion card where the micro controller unit configuration is unalterable or is updatable with a cryptographically signed update.

Dependencies are inferred from the claim text.