Formal Verification of Saber's Public-Key Encryption Scheme in EasyCrypt
ADVANCES IN CRYPTOLOGY - CRYPTO 2022, PT I(2022)
Abstract
In this work, we consider the formal verification of the public-key encryption scheme of Saber, one of the selected few post-quantum cipher suites currently considered for potential standardization. We formally verify this public-key encryption scheme's IND-CPA security and 6-correctness properties, i.e., the properties required to transform the public-key encryption scheme into an IND-CCA2 secure and 6-correct key encapsulation mechanism, in EasyCrypt. To this end, we initially devise hand-written proofs for these properties that are significantly more detailed and meticulous than the presently existing proofs. Subsequently, these hand-written proofs serve as a guideline for the formal verification. The results of this endeavor comprise hand-written and computer-verified proofs which demonstrate that Saber's public-key encryption scheme indeed satisfies the desired security and correctness properties.
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Key words
Formal Verification,Saber,EasyCrypt
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