This is an assumption which many people will obviously make- and it is an assumption, incidentally, which Wondershare does nothing to discourage, or to clarify, except in the most half-hearted, finest print imaginable. I repeat, if you have a PDF file which you cannot open without a password, this program will not attempt to "crack" it. Today's give-away from Wondershare does NOT remove these passwords. The rationale for this little crash course on PDF user passwords, for those who don't know how they work, is simply to set up this next point:
This is the so-called "brute force" approach, and its success can range from "dead easy" to practically impossible, depending on the complexity of the underlying password, i.e., bit strength. There are no "backdoors" and the only practicable approach to gaining entry to the file, assuming you were not the owner or you perhaps forgot your own password, would be to guess the password. Actually, the PDF is not merely locked, but the user password is used to derive a key of varying bit strength (depending on what version of the PDF standard the file is adhering to) which is in turn used to fully encrypt the PDF file (the encryption algorithm used depending, again, on the PDF version).Īt this point, the file is not just locked, but completely scrambled and unreadable (except, usually, for metadata). One is referred to as a "User" password, or file password, and this password is used to completely lock down a file and prevent someone-not in possession of the key-to open it.
This source of potential confusion is in regard to the question, "exactly what kind of password can this PDF Password Remover actually remove?
Since I have some previous experience with this software, I thought I'd take a moment and share some information-information which may help clarify what could otherwise be a cloud of confusion I can anticipate and envision hanging over the discussion of this GOTD.
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