Through a mathematical algorithm, a private key is like your electronic identification card; the public key is like the lock or gate mechanism that you present your ID card to.

通过一个数学算法，一个私钥如同您的电子身份证；公钥如同您向其出示身份证的锁或门机制。

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In practice, you should place the certifier under lock and key and may even put a guard (an actual person!) in charge of handing out the key via a very controlled mechanism.

实际上，您应该把证明锁起来再放上警卫(真正的人！)，通过严格控制的机制传递钥匙。

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The molecule at the heart of the lock-and-key mechanism is a protein called CTCF, say the scientists in a paper published in the journal Genome Research.

科学家发表在《基因组研究》杂志的文章说，锁钥机制的核心分子是一个叫做CTCF的蛋白。

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The company received a patent in 1865 and created one of the most important lock inventions, the Yale cylinder lock, a lock mechanism that uses pins of multiple lengths to prevent the lock from opening without the correct key.

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