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Computer Science > Cryptography and Security

arXiv:2308.14450 (cs)
[Submitted on 28 Aug 2023 (v1), last revised 18 Sep 2023 (this version, v2)]

Title:CryptoBap: A Binary Analysis Platform for Cryptographic Protocols

Authors:Faezeh Nasrabadi, Robert Künnemann, Hamed Nemati
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Abstract:We introduce CryptoBap, a platform to verify weak secrecy and authentication for the (ARMv8 and RISC-V) machine code of cryptographic protocols. We achieve this by first transpiling the binary of protocols into an intermediate representation and then performing a crypto-aware symbolic execution to automatically extract a model of the protocol that represents all its execution paths. Our symbolic execution resolves indirect jumps and supports bounded loops using the loop-summarization technique, which we fully automate. The extracted model is then translated into models amenable to automated verification via ProVerif and CryptoVerif using a third-party toolchain. We prove the soundness of the proposed approach and used CryptoBap to verify multiple case studies ranging from toy examples to real-world protocols, TinySSH, an implementation of SSH, and WireGuard, a modern VPN protocol.
Subjects: Cryptography and Security (cs.CR)
Cite as: arXiv:2308.14450 [cs.CR]
  (or arXiv:2308.14450v2 [cs.CR] for this version)
  https://doi.org/10.48550/arXiv.2308.14450

Submission history

From: Faezeh Nasrabadi [view email]
[v1] Mon, 28 Aug 2023 09:41:45 UTC (1,399 KB)
[v2] Mon, 18 Sep 2023 06:16:02 UTC (1,403 KB)
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