CAJ | 학술논문

在分析现有组密钥更新机制的基础上,提出一种基于逻辑密钥树的密钥更新方案,该方案使用单向函数、XOR运算和伪随机函数等降低存储复杂度和计算量.使用基于时间序列的组密钥增强了安全性,并引入2个变量将密钥的更新过程分为必要更新与辅助更新2个部分,减少逻辑密钥更新的次数.分析结果表明,该方案适用范围广,具有较好的鲁棒性和可扩展性.
재분석현유조밀약경신궤제적기출상,제출일충기우라집밀약수적밀약경신방안,해방안사용단향함수、XOR운산화위수궤함수등강저존저복잡도화계산량.사용기우시간서렬적조밀약증강료안전성,병인입2개변량장밀약적경신과정분위필요경신여보조경신2개부분,감소라집밀약경신적차수.분석결과표명,해방안괄용범위엄,구유교호적로봉성화가확전성.
This paper proposes a novel group key update scheme based on the analysis of the existing group key schemes.It uses the one-way function,XOR operation and the pseudo-random function to reduce the storage complexity and computation,and uses the group key which is based on time series to increase security,introduces two variables which divide the key update process into two parts,the necessary update and the auxiliary update,it significantly reduces the number of logic update.Analysis shows that the robusness and scalability of the program is good and it has a widely scope of application. XOR operation