Posts

Showing posts from April, 2013

How long will it take to Brute Force AES?

  How long will it take to brute force a given encrypted text if encrypted with 256 bit AES? As of April 3, 2013 Using modern cryptanalysis to break AES-256 bit encryption by guessing the key used on a given block of data using the Biclique Cryptanalysis method as developed by Andrey, Bogdanov, Dmitry Khovratovich, and Christian Rec hberge [i] will require a minimum of 2^254   operations for a data-space of  2^40 Bits (128 Gigabytes).  Processor Operations Per Second Number of Operations Time in Years   (@ 100% Success) Xeon E5-4650 1.4969 x 10 ^ 13 2^254 6.12818 x 10 ^ 55 I7 3970 XM 1.2969 x 10 ^13 2^254 7.07323 x 10 ^ 55 AMD 7970 (GPGPU) 3.584 x 10 ^ 15 2^254 2.55951 x 10 ^ 53 Titan (Oak Ridge National Labs) Current Top 500 King. 1.759 x 10 ^ 18 2^254 5.2150 x 10 ^ 50 Again, this is a perfect scenario; given a sample ...