Mathematics

Mathematics, 25.08.2019 19:30, noathequeen

You are choosing a computer password the password has 3 letters followed by 3 digits. how many passwords can you make if the letters are uppercase

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Mathematics, 26.08.2019 20:00, emopandabogard8712

Acomputer system uses passwords that contain exactly eight characters, and each character is one of 26 lowercase letters (a-z) or 26 uppercase letters (a-z) or 10 integers (0-9). let x denote the set of all possible passwords, and let a and b denote the events that consist of passwords with only letters or only integers, respectively. suppose that all passwords in x are equally likely. determine the probability of each of the following: (a) a(b) b(c) a password contains at least 1 integer.(d) a password contains exactly 2 integers.

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Mathematics, 09.09.2019 20:30, mimibear2932

Passwords for a certain computer system are strings of uppercase letters. a valid password must contain an even number of x’s. determine a recurrence relation for the number of valid passwords of length n. note: 0 is an even number, so abbc is a valid password. this counting problem is pretty tricky. here’s a good way to think about it: to make a good password of length n you can either (a) add any non-x to the end of a good password of length n − 1, or (b) add an x to the end of a bad password of length n − 1. for (b) you can use the good = total-bad trick to count the number of bad passwords of length n−1.

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Computers and Technology, 31.10.2019 00:31, Jamilia561

Cand systems programming part i. password strength meter weak passwords are common source of e-mail and social website accounts hacks. to alleviate this problem, pro- grams, often, when the user chooses a new password, determine if it is a legitimately strong password. you are to write a function that validates the password strength. the restrictions that we define as our defined level of strength of passwords is the following: the password must be at least eight characters long, and must include at least one uppercase, one lowercase letter, and one digit. the password cannot contain any other characters than letters and numbers. in addition, it must contain at least one string (consecutive letters) of at least four letters long (uppercase letters, lowecase letters, or combination of both). furthermore, the password should not contain the username (usernames in our login program are not case-sensitive). remember, failing to write this piece of code in the program correctly may result in accepting weak and vulnerable passwords. your code rejecting such passwords.

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