NaCl is a great encryption, hashing, and authentication library that is designed to make proper implementation easy and straight-forward. By using it (or a wrapper), many of the finer details (including speed-optimization) are abstracted away so the programmer doesn't need to worry about them. NaCl itself is less than portable C, only targeted for *nix systems. libsodium makes the library portable, and adds additional conveniences to make the library easily standardized across multiple platforms, operating systems, and languages.Crypto is very tricky to implement correctly. With this library, you are much more likely to get it correct out of the box, by implementing solid encryption standards and practices without materially effecting performance.
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