This paper presents a scheme for quantum secure direct communication with quantum encryption. The two authorized users use repeatedly a sequence of the pure entangled pairs (quantum key) shared for encrypting and de...This paper presents a scheme for quantum secure direct communication with quantum encryption. The two authorized users use repeatedly a sequence of the pure entangled pairs (quantum key) shared for encrypting and decrypting the secret message carried by the travelling photons directly. For checking eavesdropping, the two parties perform the single-photon measurements on some decoy particles before each round. This scheme has the advantage that the pure entangled quantum signal source is feasible at present and any eavesdropper cannot steal the message.展开更多
应用层加密系统在实际的应用中一般要求用户在访问文件前手动进行加解密操作,有些系统中文件正常使用时必须以明文形式存储在磁盘上.基于文件系统驱动的加密文件系统减少了用户的参与操作,同时保证了磁盘上文件处于加密状态,但是其在设...应用层加密系统在实际的应用中一般要求用户在访问文件前手动进行加解密操作,有些系统中文件正常使用时必须以明文形式存储在磁盘上.基于文件系统驱动的加密文件系统减少了用户的参与操作,同时保证了磁盘上文件处于加密状态,但是其在设计与实现上较为复杂.针对上述方法存在的问题,本文采用W indow s NT内核操作系统的驱动框架,基于文件系统过滤驱动技术实现对数据进行透明加解密.通过这种方法不仅解决了应用层加密系统存在的不足,与加密文件系统相比开发实现较简单灵活.另外使用智能卡作为加解密密钥的存储容器,进一步增强整个系统的安全性.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant Nos 10604008 and 10435020) and the Beijing Education Committee (Grant No XK100270454).
文摘This paper presents a scheme for quantum secure direct communication with quantum encryption. The two authorized users use repeatedly a sequence of the pure entangled pairs (quantum key) shared for encrypting and decrypting the secret message carried by the travelling photons directly. For checking eavesdropping, the two parties perform the single-photon measurements on some decoy particles before each round. This scheme has the advantage that the pure entangled quantum signal source is feasible at present and any eavesdropper cannot steal the message.
文摘应用层加密系统在实际的应用中一般要求用户在访问文件前手动进行加解密操作,有些系统中文件正常使用时必须以明文形式存储在磁盘上.基于文件系统驱动的加密文件系统减少了用户的参与操作,同时保证了磁盘上文件处于加密状态,但是其在设计与实现上较为复杂.针对上述方法存在的问题,本文采用W indow s NT内核操作系统的驱动框架,基于文件系统过滤驱动技术实现对数据进行透明加解密.通过这种方法不仅解决了应用层加密系统存在的不足,与加密文件系统相比开发实现较简单灵活.另外使用智能卡作为加解密密钥的存储容器,进一步增强整个系统的安全性.