机构地区: 暨南大学信息科学技术学院计算机科学系
出 处: 《小型微型计算机系统》 2004年第9期1712-1715,共4页
摘 要: 给出了一种新的 (t,n)共享验证的认证加密方案 ,其安全性基于大数的因式分解和离散对数问题 .本方案改进了现有的 (t,n)秘密共享方案 ,系统每个用户都可担任信息处理者和验证者 ,信息处理者可根据信息的安全需求设置不同的 t值 ,这些动态的操作都不需系统重新设置系统参数和各用户密钥 ;并能有效地检测和识别多种欺骗行为 。 A new authenticated encryption scheme with dynamic (t,n) shared verification is presented, the security of which is based on the factoring and discrete logarithm problem. While the system's parameter and the secret keys of every user in the scheme are kept unchanged, each user can be either a dealer of message or a message's verifier, and a different message with different threshold value t can be encrypted, hence the scheme is practical. Moreover, the efficient solutions against multiform cheating are proposed, therefore the scheme is highly security.