4. A password to a vault must have at least 8 characters where each character can be an English alphabet (case sensitive) or a digit. A hacker observes a user inserting the password and based on the time taken to insert the password, the hacker is rest assured that the password is no longer than 11 characters. If the hacker can try a million permutations per second, how long will it take to try all possible passwords?
4. A password to a vault must have at least 8 characters where each character can be an English alphabet (case sensitive) or a digit. A hacker observes a user inserting the password and based on the time taken to insert the password, the hacker is rest assured that the password is no longer than 11 characters. If the hacker can try a million permutations per second, how long will it take to try all possible passwords?
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:4. A password to a vault must have at least 8 characters where each character can be an
English alphabet (case sensitive) or a digit. A hacker observes a user inserting the
password and based on the time taken to insert the password, the hacker is rest assured
that the password is no longer than 11 characters. If the hacker can try a million
permutations per second, how long will it take to try all possible passwords?
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