GSEC · Question #317
Rainbow Tables are used in what kind of password cracking?
The correct answer is D. Pre-Computation. Rainbow tables are pre-computed hash lookup tables that allow attackers to reverse password hashes quickly by trading storage space for computation time.
Question
Rainbow Tables are used in what kind of password cracking?
Options
- ABrute-Force
- BDictionary
- CHybrid Attack
- DPre-Computation
How the community answered
(31 responses)- A6% (2)
- B16% (5)
- C3% (1)
- D74% (23)
Why each option
Rainbow tables are pre-computed hash lookup tables that allow attackers to reverse password hashes quickly by trading storage space for computation time.
Brute-force attacks enumerate and hash every possible character combination in real time rather than relying on pre-computed lookup tables.
Dictionary attacks try common words and phrases against a hash in real time using a wordlist, not through pre-computed hash chains.
Hybrid attacks combine dictionary and brute-force techniques applied in real time, not via stored pre-computed tables.
Pre-computation attacks involve generating and storing hash values for large sets of potential passwords before an attack ever begins, which is exactly how rainbow tables function. They use pre-computed chains of hash reductions to enable rapid plaintext lookup when a target hash is encountered, making cracking far faster than any real-time method.
Concept tested: Rainbow table pre-computation password attack method
Source: https://csrc.nist.gov/glossary/term/rainbow_table
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