The ECDSA nonce
Open answerIn an ECDSA signature, an ephemeral random number called a nonce is used each time. Explain why reusing the same nonce to sign two different messages is catastrophic. Illustrate with a well-known real example.
In an ECDSA signature, an ephemeral random number called a nonce is used each time. Explain why reusing the same nonce to sign two different messages is catastrophic. Illustrate with a well-known real example.