摘要
提出了一种可验证的矢量空间密钥共享方案,其安全性依赖于椭圆曲线密码的安全性。该方案具有如下特点:使(t,n)门限密钥共享方案中受托人的权限必须相同的前提条件可以推广到一般的情况;提供了验证的手段,可以检验出密钥分发者或密钥受托人的欺诈行为;分发的子密钥通过椭圆曲线密码进行了加密,使得受托人掌握的子密钥是加密后的密文形式,增强了安全性;同时,由于椭圆曲线密码体制具有加密强度高、密钥短的优点,使得该方案特别适合于计算、存储、带宽要求严格的场合。
A verifiable vector space secret sharing scheme is proposed, whose security relies on the security of Elliptic Curve Cryptography （ECC）. This scheme is characterized as follows. The precondition of （t, n）-threshold secret sharing scheme that all assignees＇ purview must be the same is generalized. A verifiable infrastructure is provided, which can be used to detect the cheaters from dealers and assignees. The shared key distributed by the dealer is encrypted based on ECC to enhance the security. Meanwhile the length of the key of ECC is much shorter than that of RSA cryptography. So the computation cost and communication cost of the proposed scheme are lower, which are valuable in applications with limited memory volume and communication bandwidth.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2008年第1期123-126,共4页
Journal of Jilin University:Engineering and Technology Edition
基金
“十五”国家科技攻关计划项目(2004BA907A20)
吉林省重大科技计划项目(20040304)
关键词
计算机系统结构
密钥共享
椭圆曲线
矢量空间
椭圆曲线离散对数问题
computer systems organization
secret sharing
elliptic curve cryptography （ECC）
vector space
elliptic curve discrete logarithm problem （ECDLP）
