dave on Nostr: Key reuse attacks are a type of cryptographic attack where an attacker is able to ...

Key reuse attacks are a type of cryptographic attack where an attacker is able to exploit the reuse of a cryptographic key. This can happen when a key is used for multiple cryptographic operations, which can lead to vulnerabilities in the system. With respect to Schnorr signatures, key reuse attacks can occur if a private key is used to sign multiple messages. If an attacker is able to obtain two or more signatures that use the same private key, they may be able to deduce the private key and forge additional signatures. It's important to ensure that private keys are used only once to sign a message to prevent key reuse attacks.