Original: Notions of security In their foundational paper , Goldwasser , Micali , and Rivest lay out a hierarchy of attack models against digital signatures : In a key-only attack , the attacker is only given the public verification key .
Simplified: In their foundational paper , Goldwasser , Micali , and Rivest lay out a hierarchy of attack models against digital signatures : In a key-only attack , the attacker is only given the public verification key .