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  • Writer's pictureTeam RareSkills

An Attack on Schnorr Threshold Signatures

A threshold signature is a cryptographic scheme where multiple parties own a portion of the private key, and a signature for a message can only be produced if enough of the parties sign the message.


This paper shows how an attacker can generate forged signatures if a proof of knowledge of the private key is not produced by each of the parties. Python code demonstrating the attack is included.


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