We present a quantum secret sharing protocol against collective-amplitude-damping noise. Each logical qubit is encoded in two qubit noiseless states. So it can function over such a noisy channel. The two agents encode their messages on each logical qubit only by performing a permutation operation on two physical qubits. Although each logical qubit received by each agent only carries a bit of information, the boss Alice can read out her agents' information by discriminating two orthogonal states by performing single-qubit measurements assisted by local operation and classical communication (LOCC).
YANG YuGuangCHAI HaiPingWANG YuanTENG YiWeiWEN QiaoYan
基于可信计算技术中的可信根、信任链和可信存储的概念,设计并实现了一种基于TCM(trusted cryptographymodule)的全盘加密系统(full disk encryption system,FDES)。FDES系统具有加密和认证功能,利用device-mapper(DM)提供的从逻辑设备到物理设备的映射框架机制,嵌入在Linux内核中,利用TCM芯片提供的加密、认证和存储等功能,实现对全部硬盘的透明加解密功能,从而确保了安全机制的不可旁路性和可靠性。
