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A hash algorithm is a function which takes a variable size input and produces a fixed size output. The algorithm tries to make it difficult to predict the output for a given input, find two inputs with the same output, or reconstruct the input from the output.

4 votes
4 answers
3k views

Irreversible hashing without collision

We are looking to allow users to log on with a smart card. The smart card reader can read the smart card ID and send it to us. We are, however, not allowed to store the smart card ID. Not in plaintex …
Konerak's user avatar
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250 votes

Is my developer's home-brew password security right or wrong, and why?

Advantages of a public protocol: Probably written by smarter people than you Tested by a lot more people (probably some of them smarter than you) Reviewed by a lot more people (probably some of them …
Konerak's user avatar
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