'How to generate Random Number-String(Alpha-Numeric) from String with given Key

So far i need to generate 6 length random key from given string I assume given string is always unique. With that i cant to plain so i need to encrypt into some 6 length random

    String plainText = "please random me ";
    String password = "secret Key";            
    String s = someMagicalFunction(plainText,password)
//  s = "a23De1"
javaencryptionpasswords


Solution 1:[1]

A six character alphanumeric string, using both uppercase and lowercase is in effect a 6 'digit' base 62 number (10+26+26=62). That gives an upper limit of 62^7-1, or about 2^43-1.

Use your input string and key to generate a number in the given range, truncating as needed, and convert it to base 62 before printing.

You do not say how secure you need the string generation to be. A non-cryptographic hash, such as the FNV hash, will be faster than a cryptographic hash like SHA256.

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Solution 1 rossum

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