Y-00协议LO-KO攻击的研究

Study of Lo-Ko Attack on Y-00 Protocol

针对“Y-00协议”的LO-KO攻击被认为得不到足够的拷贝数,以及拷贝的振幅小于接受者信号的振幅,因而攻击是无效的.但在增加了信号放大或概率克隆的手段之后,克服了LO-KO攻击的这些不足,使得LO-KO攻击仍然是成立的.

Because Eve cannot get enough copies which is able to decide the key and the amplitude of Eve＇s quantum state sequences is smaller than that of Bob, Lo-Ko attack on Y-00 protocol is considered to be ineffective. However, the shortcomings of Lo-Ko attack may be overcome after using quantum amplification or probabilistic clone. So modified Lo-Ko attack is still effective.