Arctic: Lightweight and Stateless Threshold Schnorr Signatures

ePrint Report: Arctic: Lightweight and Stateless Threshold Schnorr Signatures

Chelsea Komlo, Ian Goldberg

Threshold Schnorr signatures are seeing increased adoption in practice, and offer practical defenses against single points of failure. However, one challenge with existing randomized threshold Schnorr signature schemes is that signers must carefully maintain secret state across signing rounds, while also ensuring that state is deleted after a signing session is completed. Failure to do so will result in a fatal key-recovery attack by re-use of nonces. …

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