【摘要】 提出了一种基于Petri网的序列密码加密方案。这种方案的基本要领是用唯一可达向量无界Petri网来产生密钥序列。产生密钥序列的计算量是明文长度的线性函数。这样产生的密钥序列是没有周期性的,也不会出现大的游程。只要每次加密时选用不同的初始标识,这种密码系统是一次一密的。由于初始标识可以以赋值的形式同密文一起传送,密钥传送十分方便。更多还原

【Abstract】 A kind of stream-cipher encryption scheme based on Petri nets is presented in this paper. The principle of this scheme is using an unbounded Petri net with unique reachable vector to produce key-streams. The time complexity of this construction is a linear function of the length of plaintext. The key-streams is non-periodicity and has no large run length. This encryption scheme is one-time-pad as only as the same initial markings are not be used more than once whenever. Moreover,the key transmission is very convenient because the initial marking can be transmitted together with cipher-text every times.更多还原