%0 Journal Article
%T Practical Security Problem of Six States QKD Protocol<br>实际量子密钥分配扩展BB84协议窃听下的安全性分析
%A Chen Zhixin
%A Tang Zhilie
%A Liao Changjun
%A Liu Songhao
%A <br>陈志新
%A 唐志列
%A 廖常俊
%A 刘颂豪
%J 光子学报
%D 2006
%I 
%X It is used attenuated laser pulses as the signal source rather than single photons in practical QKD system. The channels is used to transmit are lossy. Eve's eavesdropping ability is limited. On the basis of above three points,a eavesdropping device is presented. Meanwhile,the study is analyzed the calculation of the effective average Alice/Eve mutual information and Alice/Bob error rate's upper limit in six states QKD protocol. It shows that Breidbart eavesdropping/beamsplitter is the more effective one compared with Breidbart eavesdropping(B/B strategy).
%K Quantum cryptography
%K Mutual information
%K Error rate<br>量子密码
%K 交互信息量
%K 误码率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=9F6139E34DAA109F9C104697BF49FC39&aid=1E52BD009A3B1307&yid=37904DC365DD7266&vid=6209D9E8050195F5&iid=CA4FD0336C81A37A&sid=6FBD78E3BAB60869&eid=28F8B56DB6BEE30E&journal_id=1004-4213&journal_name=光子学报&referenced_num=6&reference_num=20