We consider the energy minimization problem for a two-cell broadcasting system, where the focus is devising energy efficient joint power control and scheduling algorithms. To improve the retransmission efficiency, lin...We consider the energy minimization problem for a two-cell broadcasting system, where the focus is devising energy efficient joint power control and scheduling algorithms. To improve the retransmission efficiency, linear network coding is applied to broadcast packets. Combined with network coding, an optimal algorithm is proposed, which is based on dynamic programming. To reduce computational complexity, two sub-optimal algorithms are also proposed for large networks. Simulation results show that the proposed schemes can reduce energy consumption up to 57% compared with the traditional Automatic Repeat-reQuest (ARQ).展开更多
为应对数字版权管理中恶意发布者的挑战,提出一种可撤销访问控制加密(Revocable Identity-based Access Control Encryption,RACE)方案。RACE结合结构保持签名、非交互式零知识证明和抗碰撞聚合器,通过可净化的身份基广播加密,确保合法...为应对数字版权管理中恶意发布者的挑战,提出一种可撤销访问控制加密(Revocable Identity-based Access Control Encryption,RACE)方案。RACE结合结构保持签名、非交互式零知识证明和抗碰撞聚合器,通过可净化的身份基广播加密,确保合法发送方传输的密文经净化器处理后与原始密文格式一致。同时,引入撤销机制,通过更新密钥实现用户撤销与密文更新以增强系统的安全性。安全性分析表明,RACE满足“无读”和“无写”规则的安全要求。性能分析表明,RACE在增加安全功能的同时,实现了较低的计算和通信开销,其中解密阶段的计算开销较现有高效方案降低约12%,性能表现良好。展开更多
This paper introduced a novel method for implementing broadcast encryption. Our scheme takes advantages of bilinear map and group characteristic, and shifts most of the storage overhead to the public device instead of...This paper introduced a novel method for implementing broadcast encryption. Our scheme takes advantages of bilinear map and group characteristic, and shifts most of the storage overhead to the public device instead of storing in the tamper-proof device which is a major problem on current implementation. Furthermore, the broadcast keys in our scheme could be reused periodically resulting in more operational efficiency.展开更多
文摘We consider the energy minimization problem for a two-cell broadcasting system, where the focus is devising energy efficient joint power control and scheduling algorithms. To improve the retransmission efficiency, linear network coding is applied to broadcast packets. Combined with network coding, an optimal algorithm is proposed, which is based on dynamic programming. To reduce computational complexity, two sub-optimal algorithms are also proposed for large networks. Simulation results show that the proposed schemes can reduce energy consumption up to 57% compared with the traditional Automatic Repeat-reQuest (ARQ).
文摘为应对数字版权管理中恶意发布者的挑战,提出一种可撤销访问控制加密(Revocable Identity-based Access Control Encryption,RACE)方案。RACE结合结构保持签名、非交互式零知识证明和抗碰撞聚合器,通过可净化的身份基广播加密,确保合法发送方传输的密文经净化器处理后与原始密文格式一致。同时,引入撤销机制,通过更新密钥实现用户撤销与密文更新以增强系统的安全性。安全性分析表明,RACE满足“无读”和“无写”规则的安全要求。性能分析表明,RACE在增加安全功能的同时,实现了较低的计算和通信开销,其中解密阶段的计算开销较现有高效方案降低约12%,性能表现良好。
基金Supported by the National Natural Science Foun-dation of China (60432030) Asian Media Research Center Foun-dation (AM0551)
文摘This paper introduced a novel method for implementing broadcast encryption. Our scheme takes advantages of bilinear map and group characteristic, and shifts most of the storage overhead to the public device instead of storing in the tamper-proof device which is a major problem on current implementation. Furthermore, the broadcast keys in our scheme could be reused periodically resulting in more operational efficiency.
