Sidebar: Check out my talk Being Boring - A Survivor's Guide to Ruby Cryptography (describes RbNaCl): http://www.youtube.com/watch?v=e13irYP6WJA
RbNaCl is a Ruby FFI binding to the Networking and Cryptography Library by Dan Bernstein and his collaborators: https://github.com/cryptosphere/rbnacl Version 3.0 includes a new "SimpleBox" API designed to be the most straightforward API for cryptography possible. It automatically uses a random nonce per message (using libsodium's randombytes implementation which pulls from /dev/urandom on *IX and CryptGenRandom on Windows). Simplebox is usable for both public-key and secret-key cryptography: https://github.com/cryptosphere/rbnacl/wiki/SimpleBox http://rubydoc.info/github/cryptosphere/rbnacl/master/RbNaCl/SimpleBox Full list of changes from 2.0 below: * Rename RandomNonceBox to SimpleBox (backwards compatibility preserved) * Reverse documented order of SimpleBox/RandomNonceBox initialize parameters. Technically backwards compatible, but confusing. * Ensure all strings are ASCII-8BIT/BINARY encoding prior to use -- Tony Arcieri
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