Since the 1970s, though, the computers that do the factorisation have got bigger and faster.
但是,从二十世纪七十年代以来,能够进行因式分解的电脑越来越大,速度越来越快。
Some cryptographers therefore fear for the future of RSA.
一些密码破译者因此开始担心RSA的未来。
Hence the interest in quantum cryptography.
因此,他们把眼光放到了量子密码术上。
Alice, Bob and Werner, too?
艾莉斯,鲍伯,沃莫也这样吗?
The most developed form of quantum cryptography, known as quantum key distribution,relies on stopping interception, rather than preventing decryption.
量子密钥分配是量子密码学最流行的方式,它主要是依靠阻止拦截,而不是防止解密上。
Once again, the key is a huge numberone with hundreds of digits, if expressed in thedecimal system.
这个系统的密钥还是一个庞大的数字如果以十进制表示的话,一个就有几百个数字。
Alice sends this to Bob as a series of photons before she sends the encrypted message.
艾莉斯在发送加密信息之前,会先发送一系列的光量子给鲍伯。
For Eve to read this transmission, and thus obtain the key, she must destroy some photons.
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