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joequery/bruteforce.rb

Created May 11, 2012 15:41
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How long to brute force a key of length n?
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bruteforce.rb
# How long to brute force keys
ks = 1000000000 # A billion keys per second
clusters = 10 # How many computers in the cluster attacking our key?
numChars = 38 # We have 38 characters available to use in the key
n = 100 # Length of the key string
combinations = numChars ** n # This ignores variable length too
# How many years it would take a single computer to brute force.
secondsInYear = 31556926
singleCrackTimeInYears = (1.0 * combinations) / ks / secondsInYear
totalCrackTime = singleCrackTimeInYears / clusters
puts "#{totalCrackTime} years"
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