公开(公告)号：US12126706B2

公开(公告)日：2024-10-22

申请号：US17134351

申请日：2020-12-26

Applicant: Intel Corporation

Inventor： Siddhartha Chhabra ,  John Sell

IPC: G06F21/78 ,  G06F21/60 ,  H04L9/00 ,  H04L9/06 ,  H04L9/32

CPC classification number: H04L9/002 ,  G06F21/602 ,  H04L9/0643 ,  H04L9/3242

Abstract: Detailed herein are embodiments which allow for integrity protected access control to provide defense against deterministic software attacks. Software attacks such as rowhammer attacks which target the TD bit itself are defended against using cryptographic integrity which the data itself is protected by the TD-bit alone. As such, software is reduced to performing only non-deterministic attacks (e.g., random corruption), but all the deterministic attacks are defended against. Additionally, integrity-protected access control bits are protected against simple hardware attacks where the adversary with physical access to the machine can flip TD bits to get ciphertext access in software which can break confidentiality.

公开(公告)号：US20220209933A1

公开(公告)日：2022-06-30

申请号：US17134351

申请日：2020-12-26

Applicant: Intel Corporation

Inventor： Siddhartha CHHABRA ,  John Sell

IPC: H04L9/00 ,  G06F21/60 ,  H04L9/32 ,  H04L9/06

Abstract: Detailed herein are embodiments which allow for integrity protected access control to provide defense against deterministic software attacks. Software attacks such as rowhammer attacks which target the TD bit itself are defended against using cryptographic integrity which the data itself is protected by the TD-bit alone. As such, software is reduced to performing only non-deterministic attacks (e.g., random corruption), but all the deterministic attacks are defended against. Additionally, integrity-protected access control bits are protected against simple hardware attacks where the adversary with physical access to the machine can flip TD bits to get ciphertext access in software which can break confidentiality.