公共密钥cookie是用用户公共密钥加密的密码。

A public key cookie is the passwd encrypted with users public key.

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在创建用户之后，Oracle 使用存储在词典中的加密的密码。

Oracle uses an encrypted password stored in the dictionary once a user is created.

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现在数据库中已经拥有一个已加密的密码，但是没有对其进行解密的方法。

You now have an encrypted password in a database, but no way to decrypt it.

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But in society today, and we'll talk a bit about security topics -- and such throughout the course, for cryptography -- for encrypting things like your credit card information and bank accounts -- you don't use 32 bits, you don't use 64 bits, you generally use 1024 bits, 4,048 bits.

但在当今的社会上，我们将讨论一点安全方面的知识,贯穿整个课程，密码学-,加密一些像信用卡信息,银行账号之类的东西--你不能用32位，你也不能用64位，你通常要使用1024位，4048位。

哈佛公开课 - 计算机科学课程节选