What is a Rainbow Table?

this presentation introduces you an advanced way of decryption of data

1. What is a Rainbow Table ?

2. A rainbow table is a precomputed table for reversing cryptographic hash functions, usually for cracking password hashes.

3. Tables are usually used in recovering a plaintext password up to a certain length consisting of a limited set of characters.

4. 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.

5. Use of a key derivation function that employs a salt makes this attack infeasible.

6. Rainbow tables are an application of an earlier, simpler algorithm by Martin Hellman