On the Incoercibility of Digital Signatures

ePrint Report: On the Incoercibility of Digital Signatures

Ashley Fraser, Lydia Garms, Elizabeth A. Quaglia

We introduce incoercible digital signature schemes, a variant of a standard digital signature. Incoercible signatures enable signers, when coerced to produce a signature for a message chosen by an attacker, to generate fake signatures that are indistinguishable from real signatures, even if the signer is compelled to reveal their full history (including their secret signing keys and any randomness used to produce keys/signatures) to the …

ashley digital digital signature digital signatures elizabeth enable eprint report fake history keys message randomness report secret signature signatures signing standard