Mathematics, 06.11.2019 19:31 Senotora
You are designing a password system with randomly selected passwords. the alphabet for the passwords is the set of alphanumeric characters in english both upper and lower case and the integers 0-9. you are told that the attacker can make 250,000 guesses each minute. a. if the passwords are 7 characters long, how long until the attacker has a 50% probability of correctly guessing user’s passwords in an offline attack. b. how long do the passwords need to be to ensure that the 50% success rate is not reached until after 2 years? c. if the users select their own passwords, does this affect the relevance of your calculations from parts (a) and (b)? explain your answer.
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You are designing a password system with randomly selected passwords. the alphabet for the passwords...
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