Entropic security in quantum cryptography
Entropic security in quantum cryptography
复制标题
量子密码学中的熵安全
DOI：
10.1007/s11128-009-0111-3
复制
发表时间：
2007
影响因子：
2.5
通讯作者：
Simon Pierre Desrosiers
中科院分区：
文献类型：
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作者：
Simon Pierre Desrosiers
受Dodis和Smith定义的熵安全性和熵不可逆性的启发，提出了量子密码安全性的两个新定义。我们证明了这两个新定义的等价性。我们还提出了Dodis和Smith描述的密码的一个推广，并证明了它实际上可以在合理的条件下使用更少的非经典密钥比特来加密nqubit，并且在信息论环境中是安全的。该密码也完全缩小了量子密码与经典密码在密钥要求上的差距。
We present two new definitions of security for quantum ciphers which are inspired by the definitions of entropic security and entropic indistinguishability defined by Dodis and Smith. We prove the equivalence of these two new definitions. We also propose a generalization of a cipher described by Dodis and Smith and show that it can actually encryptnqubits using less thannclassical bits of key under reasonable conditions and yet be secure in an information theoretic setting. This cipher also totally closes the gap between the key requirement of quantum ciphers and classical ciphers.