总线故障新型总线故障攻击以破坏嵌入式系统中的可信执行环境

#BHASIA @BlackHatEventsFaults In Our Bus:Novel Bus Fault Attacks toBreak ARM TrustZoneNimish Mishra, Anirban Chakraborty, Debdeep MukhopadhyayIndian Institute of Technology Kharagpur, India# BHASIA @BlackHatEventsWho are we?Nimish MishraAnirban ChakrabortyDebdeep MukhopadhyayIndian Institute of Technology Kharagpur India# BHASIA @BlackHatEvents1.What are Faults?2.Traditional Fault Points on Embedded Systems and SoCs3.A (new) Fault Point on SoCs4.OP-TEE?5.End-to-end Attack▪Load (adversarial) Trusted Application through Faults▪Redirect communication for other Trusted Applications▪Decrypt (redirected) communication6. ImpactOutline# BHASIA @BlackHatEventsWhat are Faults?# BHASIA @BlackHatEvents•Actively perturb data or control-flow of a system and gain information about the secret through faulty system responseInputCorrect OutputIncorrect Output# BHASIA @BlackHatEvents•Fault causes error anderror can be exploited to leak secret information•Fault attack sometimes combined with side channel