行4编码字符串Double secret probation并使用Base64将加密了的这个字符串转变为可打印的字符，以便于用电子邮件等程序传输。

Line 4 encodes the string Double secret probation and USES Base64 to turn the encrypted string into printable characters that can easily be transmitted over E-mail, say.

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支持添加打印，复印和更改权限将加密的PDF文件。

Supports add printing, copying and changing permissions to an encrypted PDF file.

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锁定打印作业处理函数库中包含的函数实现对打印作业的加密、创建、打印、删除等操作；

The Lib-Job function library includes all of the functions to encrypt, create, print or delete the locked print jobs;

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