基于单粒子的量子公钥加密协议

提出一种基于单粒子的量子公钥加密协议。利用随机序列的映射关系对私钥实施量子操作,生成用于消息加密的量子公钥。根据量子不可克隆和密文不可分辨定理,引入新的量子源作为通信传输的载体,设计了易操作的加密编码和解密规则;采用分块的方法,优化了窃听检测方法,降低了对发送方存储能力的要求;结合一次一密的加密方案,保证了在量子通信信道中传送密钥和消息的安全性。基于纠缠态的量子加密算法和基于单粒子的量子公钥加密方案相比较,所提出的协议易于实现,具有良好的使用价值。分析表明,本协议是安全的。     

基于量子搜索算法的非对称量子加密协议(英文)

Quantum cryptography and quantum search algorithm are considered as two important research topics in quantum information science.An asymmetrical quantum encryption protocol based on the properties of quantum one-way function and quantum search algorithm is proposed.Depending on the no-cloning theorem and trapdoor one-way functions of the publickey,the eavesdropper cannot extract any private-information from the public-keys and the ciphertext.Introducing key-generation randomized logarithm to improve security of our proposed protocol,i.e.,one privatekey corresponds to an exponential number of public-keys.Using unitary operations and the single photon measurement,secret messages can be directly sent from the sender to the receiver.The security of the proposed protocol is proved that it is informationtheoretically secure.Furthermore,compared the symmetrical Quantum key distribution,the proposed protocol is not only efficient to reduce additional communication,but also easier to carry out in practice,because no entangled photons and complex operations are required.     

智能化浇灌系统的设计与实现

为了解决因无人照料导致植物枯萎及水资源高效利用的问题,设计了一种适用室内盆栽使用的智能化浇灌系统。该设计以STC89C54RD单片机为核心,结合外围温度传感器、土壤湿度测量电路及浇水器电路,实现了根据不同的土壤类型、室内环境温度及土壤湿度的条件对多盆花卉进行独立智能调节浇水量的浇灌操作和手动定时浇灌功能。实验结果表明,本系统能够在不同土壤和外部温度条件下,实现对多盆盆栽进行浇灌功能的目的,验证了智能浇灌系统的可行性。