The KeyedFile class represents a system file that has access by key while the SequentialFile class represents a system file that has access by record number.

Keyed file类表示一个通过密钥访问的系统文件，而sequentialfile类表示一个通过记录编号访问的系统文件。

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Private objects are protected by user access key.

私有对象由用户访问密钥保护。

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Simple access is a little slower than a simple query (find a single object by primary key) to a database.

对数据库的简单访问要比对数据库的查询(通过主键找到一个单一对象)慢一些。

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As you can see in the screen shot below (from the Ars Technica article), you can provide links to your files (either containing the key so someone can access them directly or by providing them with the key separately) but you are prompted with a caution about not transmitting the keys through insecure channels and a far-reaching copyright warning.

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Julian Sanchez of the Cato Institute has previously pointed out that a downside to creating an easy access key for the feds, is that an easy access key then exists and can be stolen by hackers.

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Unless the Canadian government accedes to his views, he seems ready to put the brakes on future oil sands development by curtailing Canadian access to its key export market.

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