![]() Remember that encryption we talked about earlier? Usually, to break it, an attacker has to find a flaw in the encryption algorithm or spend thousands of years trying to guess all possible encryption keys. Let’s start by discussing the open password. Each has a different function, and each has serious security flaws. In the case of Adobe PDF protection, there are two passwords: the open password and the permissions password. Passwords alone just aren’t a good way to protect documents (or anything important, really). The crux of the issue is that Adobe allows users to decrypt and open the document by entering a password. Though the encryption algorithm used by Adobe PDF is very strong (up to AES 256-bit), its implementation is not.
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