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- W3100817720 abstract "The design of tiny trust anchors has received significant attention over the past decade, to secure low-end MCU-s that cannot afford expensive security mechanisms. In particular, hardware/software (hybrid) co-designs offer low hardware cost, while retaining similar security guarantees as (more expensive) hardware-based techniques. Hybrid trust anchors support security services, such as remote attestation, proofs of software update/erasure/reset, proofs of remote software execution, in resource-constrained MCU-s, e.g., MSP430 and AVR AtMega32. Despite these advances, detection of control-flow attacks in low-end MCU-s remains a challenge, since hardware requirements of the cheapest related architectures are often more expensive than the MCU-s themselves. In this work, we tackle this challenge by designing Tiny-CFA - a control-flow attestation (CFA) technique with a single hardware requirement - the ability to generate proofs of remote software execution (PoX). In turn, PoX can be implemented very efficiently and securely in low-end MCU-s. Consequently, our design achieves the lowest hardware overhead of any CFA architecture (i.e., two orders of magnitude cheaper), while relying on a formally verified PoX architecture as its sole hardware requirement. With respect to runtime overhead, Tiny-CFA also achieves better performance than prior CFA techniques based on code instrumentation. We implement and evaluate Tiny-CFA, analyze its security, and demonstrate its practicality using real-world publicly available applications." @default.
- W3100817720 created "2020-11-23" @default.
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- W3100817720 date "2020-11-14" @default.
- W3100817720 modified "2023-10-16" @default.
- W3100817720 title "Tiny-CFA: A Minimalistic Approach for Control-Flow Attestation Using Verified Proofs of Execution." @default.
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