I love the README, it's very modest and I enjoy reading things like "if a function is longer than, say, 5 lines, I didn't write it myself." and "While you probably shouldn't trust random security code from the Internet, I'm reasonably confident that this code is secure. I did not implement any of the hard math (poly1305, XSalsa20, curve25519) myself - I call into golang.org/x/crypto for all of those functions. I also ported over every test I could find from the C/C++ code, and associated RFC's, and ensured that these libraries passed those tests."<p>I will wait for other companies to use it first - but it looks like a very level-headed implementation that won't be hard for the author to maintain - and a very useful tool.