Why is it so hard to crack open PDF password?
To crack PDF password at open level is a difficult and time-consuming thing to do. The difficulty of cracking the password relies on several factors: 1. The version of Adobe Acrobat used to create the file is one main factor. Lower version of Acrobat such as Acrobat 3.0 uses 40-bit RC4 encryption, which is easier to crack. But now with Acrobat 9, 256-bit AES encryption makes it much harder to remove. As for every password, there is much more possibilities added. 2. The complexity of Password is also important. Simple password is easy to crack, especially if it is the name of your child or the birthday of your wire. If the password was created at random with complex combination of upper case, lower case, numbers, and symbols, then it will be harder to remove. 3. The length of password is the last but not least factor to consider. Longer password definitely requires more time to try every possible password. How to crack open PDF password? The main methods to crack PDF open password are:
