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Cryptography is the practice and study of logical means used to achieve information confidentiality, integrity and authenticity. It covers, among other things, encryption (making some data unreadable except for those who know a given secret element, called a key), data hashing (in particular for password storage) and digital signatures (provable integrity and authenticity with non-repudiation).

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I like the idea of rolling your own. Thing about mathematical/cryptographical discoveries today is that it's hard, probably impossible, to get peer review. Because it's probably as much or more work t …
answered May 14 '15 by Chris Miller