
handle: 20.500.11850/730661
We provide several attacks on the BASS signature scheme introduced by Grigoriev, Ilmer, Ovchinnikov and Shpilrain in 2023. We lay out a trivial forgery attack which generates signatures passing the scheme's probabilistic signature verification with high probability. Generating these forgeries is faster than generating signatures honestly. Moreover, we describe a key-only attack which allows us to recover an equivalent private key from a signer's public key. The time complexity of this recovery is asymptotically the same as that of signing messages.
Cryptanalysis, boolean automorphism, digital signatures, Cryptanalysis; digital signatures; boolean automorphism
Cryptanalysis, boolean automorphism, digital signatures, Cryptanalysis; digital signatures; boolean automorphism
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