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Why is WalnutDSA specified for COSE?

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WalnutDSA was a 1st-round entrant in the NIST Post-Quantum Cryptography project. It had a significant cryptanalytic break close to almost breaking the security of the cryptosystem, only survived due to the break cannot fit a bogous signature into the length field of the encoded signature.

Why was such (almost) broken crypto system specified for use with COSE? Who was pushing for it?

mangohost

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