ID 原文 译文
46746 基于属性的签名能够实现细粒度的访问控制，被认为是云计算环境中一种重要的匿名认证手段。 Attribute-based signature (ABS), which could realize fine-grained access control, was considered to be an important method for anonymous authentication in cloud computing.
46747 但常见的属性基签名只能通过门限结构提供简单的访问控制，无法应对云环境中的大规模用户属性集。 However, normal ABS only provided simple access control through threshold structure and thus could not cope with the large-scale attribute sets of users in the cloud.
46748 同时，用户属性集由唯一的属性权威管理，增加了属性权威的计算和存储开销， More-over, the attribute sets were supervised by only one attribute authority, which increased the cost of computation and storage.
46749 一旦属性权威被攻破，整个系统就会面临崩溃的风险。 The whole system was in danger of collapsing once the attribute authority was breached.
46750 针对以上问题，提出了一种支持树形访问结构的多权威属性签名方案，可以支持任意形式的与、或和门限结构，提供了更灵活的访问控制。 Aiming at tackling the problems above, a novel scheme, was proposed called multi-authority ABS supporting dendritic access structure which supported any AND, OR and threshold gates and affords more flexible access control.
46751 将用户属性集由不同属性权威分类管理，减少开销的同时也降低了系统的风险。 Meanwhile, the attribute sets of users were classified by diverse attribute authorities which reduced the overhead and the risk of systems.
46752 此外，在随机预言机模型下证明了方案是给定策略选择消息攻击(SP-CMA)安全的。 Besides, the scheme is proved to be selective predicate chosen message attack secure in the random oracle model.
46753 提出了一个新型的基于生物特征和口令的双因子认证与密钥协商协议。 A new two-factor authenticated key agreement protocol based on biometric feature and password was pro-posed.
46754 该双因子协议利用用户的生物特征以及口令信息实现安全通信，用户不需要携带智能卡。 The protocol took advantages of the user’s biological information and password to achieve the secure communication without bringing the smart card.
46755 利用模糊提取技术，服务器不再保存用户生物信息，避免了服务器被攻陷用户敏感信息丢失的风险。 The biometric feature was not stored in the server by using the fuzzy extractor technique, so the sensitive information of the user cannot be leaked when the server was corrupted.