%0 Journal Article
%T On the Condition and the Proof of the Existence of Perfect Secrecy Cryptosystem<br>完善保密密码体制的条件和存在性证明
%A LEI Feng-yu
%A CUI Guo-hu
%A XU Peng
%A ZHANG Sha-sh
%A CHEN Jing
%A <br>雷凤宇
%A 崔国华
%A 徐鹏
%A 张沙沙
%A 陈晶
%J 计算机科学
%D 2010
%I 
%X Perfect secrecy of cryptosystem is one of the important methods weighing the security of secrecy system.Based on the deep analysis of the relationship among plaintext size,ciphertext size,key size and the key probability of perfect secrecy of cryptosystem,two necessary conditions for special perfect secrecy cryptosystem were presented and proved.This paper suggested an approach to build perfect secrecy cryptosystem and summarized four correlated restrictions.By researching a question about the existence of ...
%K Cryptography
%K Cryptosystem
%K Perfect secrecy
%K Computational security
%K Equivalent keys<br>密码学
%K 密码体制
%K 完善保密
%K 计算安全性
%K 等价密钥
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=64A12D73428C8B8DBFB978D04DFEB3C1&aid=0A383767B8F7DEBAA82EC8E0A59588BD&yid=140ECF96957D60B2&vid=42425781F0B1C26E&iid=94C357A881DFC066&sid=A4FA325EA800C820&eid=331211A5F5616413&journal_id=1002-137X&journal_name=计算机科学&referenced_num=0&reference_num=0