诚实发送者承诺与诚实接收者承诺

摘要

诚实发送者承诺是为了构造非交互的非延展承诺而引入的.该文给出了两个诚实发送者承诺:第1个是诚实发送者统计绑定的,第2个是完全隐藏的.这两个协议都不是承诺方案.这说明诚实发送者承诺是弱于承诺方案的密码学原语.此外,该文定义了诚实接收者承诺,并给出了两个构造:第1个构造具有统计绑定性质,第2个构造具有诚实接收者完全隐藏性质.这两个方案都不是承诺方案,从而说明了诚实接收者承诺是弱于承诺方案的密码学原语.%Honest-sender commitments were introduced to construct non-interactive and non-malleable commitments. In this paper,two honest-sender commitments are given: The first one is honest-sender statistically binding and the second one is perfectly hiding. Neither of them is a commitment scheme, which implies that honest-sender commitment is a weaker cryptographic primitive than commitment scheme. In addition, this paper defines honest-receiver commitment and gives two constructions: The first one has the statistically binding property and the second has the honest-receiver perfectly hiding property. Both of them are not commitment scheme, which implies that honest-receiver commitment is a weaker cryptographic primitive than commitment scheme.