作者: Silvio Micali , Leonid Reyzin
关键词: Computer security 、 Public-key cryptography 、 Communication complexity 、 Digital signature 、 Concrete security 、 Computer science 、 Signature (logic) 、 Information protection policy 、 Theoretical computer science
摘要: We provide two contributions to exact security analysis of digital signatures: 1. put forward a new method constructing Fiat-Shamir-like signature schemes that yields better "exact security" than the original Fiat-Shamir method; and 2. extend cost-security by showing with "loose may be preferable for reasonable measures cost.