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標(biāo)準(zhǔn)的PDF加密與用來保護(hù)PDF格式的唯一擁有者和用戶密碼。不幸的是密碼不停止傳遞到別人PDF文檔別人。更糟的是,PDF格式密碼可以很容易被刪除的事實(shí)。例如所有者的密碼可以被刪除在幾秒鐘內(nèi)甚至不知道密碼。
Standard PDF Encryption with owner and user passwords used to be the only PDF protection. Unfortunately passwords do not stop somebody of passing the PDF document on to somebody else. Even worse is the fact that PDF passwords can be removed very easy. The owner password for example can be removed in a matter of seconds without even knowing the passwords.
官方網(wǎng)站:http://www.aloaha.com/wi-software-en/aloaha-filecrypter.php