On 2014-04-23 11:30, Rafael Copquin wrote:
Hi Kevin
What is a "rainbow table" ?
http://en.wikipedia.org/wiki/Rainbow_table
A rainbow table is a precomputed table for reversing cryptographic hash
functions, usually for cracking password hashes. Tables are usually used
in recovering a plaintext password up to a certain length consisting of
a limited set of characters. It is a practical example of a space/time
trade-off, using more computer processing time at the cost of less
storage when calculating a hash on every attempt, or less processing
time and more storage when compared to a simple lookup table with one
entry per hash. Use of a key derivation function that employs a salt
makes this attack unfeasible.
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