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A cryptographic hash algorithm is a function which takes a variable size input and produces a fixed size output. The algorithm makes it difficult to find two inputs with the same output or reconstruct the input from the output.

4 votes
1 answer
2k views

How can I generate a one-time password?

What I would like to know is which one I can use to generate OTP using hash function and some session tokens (IP address, etc.). These tokens will be used as parameters of the hash function. …
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