基于Lagrange插值多项式的门限方案的实现  

Implementation of Threshold Scheme Based on Lagrange Polynomial Interpolation

作　　者：刘蓬涛[1] 李大兴[1] 

机构地区：[1]山东大学网络信息安全研究所,济南250100

出　　处：《计算机工程与应用》2005年第36期117-119,共3页Computer Engineering and Applications

基　　金：国家863高技术研究发展计划资助项目(编号:2003AA141120)

摘　　要：门限方案中,将秘密分割为若干份,需要多个秘密拥有者合作才能恢复秘密。可防止因一部分人原因而泄露秘密,使密钥的管理更加安全灵活。实现了一个基于Lagrange插值多项式的门限方案,包括秘密分割和秘密恢复两方面。并介绍了在基于DSP芯片的加密卡上的应用,实现密钥的管理,如卡内关键数据的备份、恢复等重要操作。In a threshold scheme,a secret is divided into some shares,and to recover the secret requires multi-share holders to cooperate.In this way,secret is prevented from being let out for some factitious reasons,so key management will be much safer and agiler.A threshold scheme based on Lagrange polynomial interpolation is implemented,including secret division and secret recovery.The application on an encryption card using DSP chip is introduced to manage secret key,and some important operations,such as to backup or recover key data in the card,are carried out.

关 键 词：秘密共享方案 拉格朗日插值多项式 门限密码体制 DSP 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]