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Security of Hedged Fiat-Shamir Signatures under Fault Attacks
signature schemes fault attacks Fiat-Shamir signatures
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2019/8/22
Deterministic generation of per-signature randomness has been a widely accepted solution to mitigate the catastrophic risk of randomness failure in Fiat-Shamir type signature schemes. However, recent ...
On Security of Fiat-Shamir Signatures over Lattice in the Presence of Randomness Leakage
Randomness leakage attacks Fiat-Shamir signature Dilithium
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2019/6/19
Leakage during the signing process, including partial key exposure and partial (or complete) randomness leakage, may be devastating for the security of digital signatures. In this work, we consider th...
A Concrete Treatment of Fiat-Shamir Signatures in the Quantum Random-Oracle Model
Fiat-Shamir Quantum Random Oracle Tightness
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2017/9/25
The Fiat-Shamir transform is a technique for combining a hash function and an identification scheme to produce a digital signature scheme. The resulting scheme is known to be secure in the random orac...