组合公钥CPK(Combined Public Key)是我国拥有完全知识产权的认证技术,与PKI和IBC相比有其独特的优势。但由于密钥由种子密钥经过组合运算生成,因此可能发生碰撞,有效解决碰撞问题已成为CPK体制发展和完善的关键。介绍了CPK的发展、研...组合公钥CPK(Combined Public Key)是我国拥有完全知识产权的认证技术,与PKI和IBC相比有其独特的优势。但由于密钥由种子密钥经过组合运算生成,因此可能发生碰撞,有效解决碰撞问题已成为CPK体制发展和完善的关键。介绍了CPK的发展、研究现状和存在问题;根据其构建特点,提出了两种新的种子公/私钥组合选取方法,使得在相同规模的安全需求下,所需种子公/私钥量大大减少;针对产生碰撞的两种可能因素提出了解决方案:用分组密码对用户标识进行映射、按照特定规则产生种子公/私钥库以及对椭圆曲线参数进行约束,从根本上消除了碰撞。优化后的CPK体制,无碰撞,种子库规模小,构建效率高,占用空间少,安全性高,可靠性强,便于管理。展开更多
Some security-sensitive fields like military scenarios are the main application areas of ad hoc networks.In those areas,security issues have to be considered seriously for the network.In this paper, a key management m...Some security-sensitive fields like military scenarios are the main application areas of ad hoc networks.In those areas,security issues have to be considered seriously for the network.In this paper, a key management method based on the combined public key is proposed for ad hoc networks. Through this method,private and public key pairs can be distributed to nodes of ad hoc networks efficiently.No certificate or other authentic channel is needed while two nodes perform authentication and key agreement protocol.The key management method is especially suitable for ad hoc networks,which has no fixed infrastructure and has constrained resources.展开更多
文摘组合公钥CPK(Combined Public Key)是我国拥有完全知识产权的认证技术,与PKI和IBC相比有其独特的优势。但由于密钥由种子密钥经过组合运算生成,因此可能发生碰撞,有效解决碰撞问题已成为CPK体制发展和完善的关键。介绍了CPK的发展、研究现状和存在问题;根据其构建特点,提出了两种新的种子公/私钥组合选取方法,使得在相同规模的安全需求下,所需种子公/私钥量大大减少;针对产生碰撞的两种可能因素提出了解决方案:用分组密码对用户标识进行映射、按照特定规则产生种子公/私钥库以及对椭圆曲线参数进行约束,从根本上消除了碰撞。优化后的CPK体制,无碰撞,种子库规模小,构建效率高,占用空间少,安全性高,可靠性强,便于管理。
文摘Some security-sensitive fields like military scenarios are the main application areas of ad hoc networks.In those areas,security issues have to be considered seriously for the network.In this paper, a key management method based on the combined public key is proposed for ad hoc networks. Through this method,private and public key pairs can be distributed to nodes of ad hoc networks efficiently.No certificate or other authentic channel is needed while two nodes perform authentication and key agreement protocol.The key management method is especially suitable for ad hoc networks,which has no fixed infrastructure and has constrained resources.
