City Guilds Model Questions Vol1 2020 Information Technology Question 37
Practice objective / multiple choice question 37 from the 2020 City Guilds Model Questions Vol1 Information Technology examination.
An organization enforces a password policy: passwords are exactly eight characters long. Each character can be an uppercase letter (\(26\) choices), a lowercase letter (\(26\) choices), a digit (\(10\) choices) or one of eight special symbols. The password must contain at least two digits and at least one special symbol. Passwords are stored as a salted SHA‑256 hash. An attacker can compute \(2^{30}\) SHA‑256 hashes per second on a GPU cluster and attempts passwords uniformly at random respecting the policy. Estimate the expected time for the attacker to discover a particular password, and give the answer in hours rounded to two decimal places.
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This is City Guilds Model Questions Vol1 2020 Information Technology Question 37. It is one of the objective questions from the 2020 City Guilds Model Questions Vol1 Information Technology examination.
Difficulty level: Hard .
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