摘要
根据RSA加密系统和小公钥的动态放大技术,提出了一种面向不同组的用户的广播加密新方案。在新方案中,每个用户都采用相同的小公钥,利用它可同时对不同组的接收者进行广播加密传送消息。加密阶段发送者根据接收用户数计算安全的放大因子,然后引入随机整数,将明文消息加密生成广播传送的密文。这样不仅提高了RSA的加密速度,而且可同时抵御低指数攻击和重发攻击,并实现对不同组的接收者进行广播加密传送消息。
In this paper, a new broadcast encryption scheme of RSA oriented multi-recipient is presented, according to the protocol of RSA and the enlarging the small public key technology. This protocol allows multi-recipient using the same public key, use it the sender can transmit the cryptograph to multi-recipient at once time by broadcast. During the process of encrypting, the sender calculates a number to enlarge the public key based the number of recipients and selects a random number, then encrypts the message to cryptograph which can be transmit by broadcast. Therefore, it can enhance the encryption speed of RSA while withstanding the low exponent attack and multi-sending attack. More important, this protocol is provided with the function of transmit message to multirecipient by broadcast. So it can be use in many domain of information.
出处
《微计算机信息》
北大核心
2006年第03X期59-60,共2页
Control & Automation
基金
国家自然科学基金(#60173038
69873020)
广东省自然科学基金(#010421
000759)资助项目
关键词
RSA
广播加密
低指数攻击
重发攻击
RSA
Broadcast encryption
low exponent attack
multi-sending attack
