Abstract: Embodiments provide systems and methods to optimize signature verification time for a cryptographic cache. Time is reduced by eliminating at least some of the duplicative application of cryptographic primitives. In some embodiments, systems and methods for signature verification comprise obtaining a signature which was previously generated using an asymmetrical cryptographic scheme, and determining whether an identical signature has previously been stored in a signature cache. If an identical signature has been previously stored in the signature cache, retrieving previously generated results corresponding to the previously stored identical signature, the results a consequence of application of cryptographic primitives of the asymmetrical cryptographic scheme corresponding to the identical signature. The results are forwarded to a signature verifier. In at least some embodiments, at least one of these functions occurs in a secure execution environment.

Abstract: In at least some embodiments, an electronic device comprises a processor and an encryption/decryption (E/D) engine coupled to the processor via a bus. The E/D engine selectively operates in a first mode and a second mode. For the first mode, an E/D engine output is provided to the bus. For the second mode, the E/D engine output is not provided to the bus and is accessible only to the E/D engine.

Abstract: In at least some embodiments, an electronic device comprises a processor and an encryption/decryption (E/D) engine coupled to the processor via a bus. The E/D engine selectively operates in a first mode and a second mode. For the first mode, an E/D engine output is provided to the bus. For the second mode, the E/D engine output is not provided to the bus and is accessible only to the E/D engine.

Abstract: Embodiments provide systems and methods to optimize signature verification time for a cryptographic cache. Time is reduced by eliminating at least some of the duplicative application of cryptographic primitives. In some embodiments, systems and methods for signature verification comprise obtaining a signature which was previously generated using an asymmetrical cryptographic scheme, and determining whether an identical signature has previously been stored in a signature cache. If an identical signature has been previously stored in the signature cache, retrieving previously generated results corresponding to the previously stored identical signature, the results a consequence of application of cryptographic primitives of the asymmetrical cryptographic scheme corresponding to the identical signature. The results are forwarded to a signature verifier. In at least some embodiments, at least one of these functions occurs in a secure execution environment.