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8 August, 05:52

Previously, our password was 8 characters and included only lower-case letters. Now, because of changing requirements, we generate a random password with lower-case and upper-case letters, as well as numbers. How long of a password do we need in order to have the same security or better as before?

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  1. 8 August, 08:17
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    7 characters.

    Explanation:

    Here we have 26 (small letters) + 26 (capital letters) + 10 (number from 0-9) = 62

    As we are having more number of possibilities for each character of the password, We will need a smaller length to reach the same or better level of security.

    If we take 6 characters long password we will have 626 = 56,800,235,584‬ possibilities, which is less secure than the previous 8 characters long password.

    But if we take 7 characters long password we will have 627 = 3,521,614,606,208 possibilities, which is almost 17 times larger than the previous password and has a smaller length when compared to the previous password.
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