Intel Corporation
TAGLESS IMPLICIT INTEGRITY WITH MULTI-PERSPECTIVE PATTERN SEARCH

Abstract:

Embodiments are directed to tagless implicit integrity with multi-perspective pattern search for memory safety. An embodiment of an apparatus includes one or more processors comprising hardware circuitry to: access encrypted data stored in a memory hierarchy using a pointer; decrypt the encrypted data using a current version of a pointer tag of the pointer to yield first decrypted data; perform an entropy test on the first decrypted data; responsive to the entropy test failing to detect patterns in the first decrypted data, re-decrypt the encrypted data using one or more different versions of the pointer tag of the pointer to yield one or more other decrypted data; perform the entropy test on the one or more other decrypted versions; and responsive to the entropy test detecting the patterns in the one or more other decrypted data, signal an exception to the one or more processors with respect to the encrypted data.