机构地区: 暨南大学信息科学技术学院计算机科学系
出 处: 《计算机研究与发展》 2001年第9期1042-1045,共4页
摘 要: 在具有 (t,n)共享验证的认证加密方案中 ,n个验证者共同分享信息恢复的责任 ,t个或 t个以上的验证者互相合作可恢复加密的信息 ,少于 t个验证者却不能恢复加密的信息 .1998年 Hsu和 Wu提出了一种具有 (t,n)共享验证的认证加密方案 ,但该方案不能抵抗欺骗行为的攻击 .改进了 Hsu- Wu方案 ,其安全性基于大数的因式分解问题和离散对数问题 .本方案不仅能识别骗子的多种欺骗行为 ,提高了安全水平 ,而且传输信息量小 . An authenticated encryption scheme with (t, n) shared verification is a method allowing n verifiers to share the responsibility for message recovery in such a way that any t or more of them can cooperatively reconstruct the message, while any t-1 or less of them can not. In 1998, Hsu and Wu proposed an authenticated encryption scheme with (t, n) shared verification,which can not resist the cheating attack. An improvement of the Hsu-Wu's scheme is presented, the security of which is based on the factoring and discrete logarithm problem. This improved scheme against multiform cheating achieves higher security level and requires fewer transmitted messages than the existing scheme.
关 键 词: 共享验证 认证加密 离散对数 网络安全 计算机网络
领 域: [自动化与计算机技术] [自动化与计算机技术]