City Guilds Model Questions Vol1 2018 Information Technology Question 21
Practice objective / multiple choice question 21 from the 2018 City Guilds Model Questions Vol1 Information Technology examination.
A system stores passwords using a salted SHA‑256 hash. An attacker can compute \(2^{30}\) hash operations per second. The password policy requires passwords of length \(12\) characters, each character can be an uppercase letter (26), a lowercase letter (26), a digit (10) or a special character (12). Additionally, each password must contain at least one digit and at least one special character. Assuming the attacker performs an exhaustive search and on average needs to try half of the possible passwords, estimate the expected cracking time in years. Round your answer to the nearest thousand years.
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About This Question
This is City Guilds Model Questions Vol1 2018 Information Technology Question 21. It is one of the objective questions from the 2018 City Guilds Model Questions Vol1 Information Technology examination.
Difficulty level: Hard .
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