Ace on Tech - Latest Comments in To crack 17-character AES password: 100 years and 1 billion dollars

Re: To crack 17-character AES password: 100 years and 1 billion dollars

Your Name — Tue, 28 Sep 2010 11:11:50 -0000

Yeah, this table is completely wrong. If the size of the set of possible characters is C and the maximum number of characters in the password is N, then you will require roughly C^N/2 tries to crack the password -- the table appears to be assuming that you require on the order of C*N tries. A truly random 17 character password is wholly outside of the reach of pretty much anyone nowadays. Also, your statements assume that you can get another computer for only one dollar, and assumes it doesn't cost anything to power them. Finally, chances are you aren't trying to crack the password using AES, but using some hashing scheme which generates the actual key AES uses, and depending upon the hashing scheme you could possibly perform many millions or only a few guesses per second. Trying to crack the AES key directly would be utterly infeasible.

Re: To crack 17-character AES password: 100 years and 1 billion dollars

Someone — Mon, 27 Sep 2010 07:46:42 -0000

Care to show your working? A factor of 30 difference going from a 2 to 3 characters password (which would only be correct if you had a 30 character alphabet) yet only a factor of 1.1 from 16 to 17 characters? How does that work?

Re: To crack 17-character AES password: 100 years and 1 billion dollars

Amit — Sat, 11 Oct 2008 05:15:16 -0000

Sir,

Commendable information.

I would further like to know, the data security in cryptainer files with more than 20 digits ( alpha ) password is secure enough ?