Password protect a pdf file?

pgp_protector said:

You also get equivalent results (shorter is worse)
https://howsecureismypassword.net/
Password Strength Estimator

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I've only included a small dictionary of the most common english words and passwords. It doesn't try any of the common variations that an actual attacker would (e.g. 0 for o).

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pgp_protector said:

Strong vs Long is losing more & more due to Brute force speeds (One of the reasons I hate MS Accounts they Limit your password length)

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pgp_protector said:

Cheap GPUs are rendering strong passwords useless | ZDNet

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Throw in a nine-character, mixed-case random password, and while a CPU would take a mind-numbing 43 years to crack this, the GPU would be done in 48 days.

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pgp_protector said:

1) GRC 15.67 Thousand Centuries
2) 2.01 hundred billion trillion trillion trillion trillion trillion trillion centuries

This is taking into account Dictionary attacks because Dictionary attacks only work on words not phrases.

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EphesiaNZ said:

And what about phrase attacks?

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The research takeaway is that while passphrases are safer than passwords, they're not all that safe, depending, of course, on length.

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pgp_protector said:

.. and don't use "I'm sorry Dave, I can't do that" (Common phrases in other words)

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