【摘要】 在公开的网络中采用匿名连接,使攻击者既窃听不到机密也实施不了流量分析。但现有方案中,使用重复加密和签名同一消息包的方法传送信息必然使系统效率降低;其次,使用常规公钥密码方法仍可使攻击者通过验证密钥等分析原发节点位置。而采用代理加密转换方法时,其中间节点不用解密就可把密文消息转换成后续节点可接受的密文消息,从而取得更高的隐蔽程度。因此,本文应用多方门限代理加密转换技术,提出了信息传送的新方案并分析了其安全性。更多还原

【Abstract】 Anonymous routing connections on open networks are strongly resistant to both eavesdropping and traffic analysis. However, encrypting and signing the same massage package in the schemes available will reduce its efficiency. In addition, the attacker can still perform traffic analysis by getting the originator抯 keys to the massage packages when these packages are transported by using standard public key cryptographic techniques. But when used proxy re-encryption, the mid-proxy can transform between ciphers from one encryption key to another encryption key without having to expose the cleartexts to the participants involved. Therefore, a new massage transportation scheme is proposed with quorum controlled proxy re-encryption technique and an analysis of security is given.更多还原