A password is a string of 8 characters taken from the alphabet (that is, the set...
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A password is a string of 8 characters taken from the alphabet (that is, the set of 26 characters (a, b, c,...., x, y, z)), the set of 10 digits {0, 1, 3, 4, 5, 6, 7, 8, 9) and the set of 5 special characters {!,@,#, *, +}. a) How many unique passwords are there? b) How many unique passwords are there where no character can be repeated and there are exactly 2 digits? c) How many unique passwords are there where you can repeat characters and there are at least 2 digits? d) How many unique passwords are there where you can repeat characters and have at least 2 digits and at least 1 special character? A password is a string of 8 characters taken from the alphabet (that is, the set of 26 characters (a, b, c,...., x, y, z)), the set of 10 digits {0, 1, 3, 4, 5, 6, 7, 8, 9) and the set of 5 special characters {!,@,#, *, +}. a) How many unique passwords are there? b) How many unique passwords are there where no character can be repeated and there are exactly 2 digits? c) How many unique passwords are there where you can repeat characters and there are at least 2 digits? d) How many unique passwords are there where you can repeat characters and have at least 2 digits and at least 1 special character?
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Related Book For
Logic And Computer Design Fundamentals
ISBN: 9780133760637
5th Edition
Authors: M. Morris Mano, Charles Kime, Tom Martin
Posted Date:
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