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GIAC

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.

Access Control and Password Management

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)
  • A
    6% (2)
  • B
    16% (5)
  • C
    3% (1)
  • D
    74% (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.

ABrute-Force

Brute-force attacks enumerate and hash every possible character combination in real time rather than relying on pre-computed lookup tables.

BDictionary

Dictionary attacks try common words and phrases against a hash in real time using a wordlist, not through pre-computed hash chains.

CHybrid Attack

Hybrid attacks combine dictionary and brute-force techniques applied in real time, not via stored pre-computed tables.

DPre-ComputationCorrect

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

Topics

#rainbow tables#password cracking#pre-computation#hash

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