libsodium 是一个先进而且易用的加密库。主要用于加密、解密、签名和生成密码哈希等等。这是一个可移植的、跨编译器支持、可安装的，基于 NaCI 开发，提供一个兼容 API。
libsodium 1.0.2 发布，此版本更新内容如下：
The _easy and _detached APIs now support precalculated keys; crypto_box_easy_afternm(), crypto_box_open_easy_afternm(), crypto_box_detached_afternm() and crypto_box_open_detached_afternm()have been added as an alternative to the NaCl interface.
Memory allocation functions can now be used on operating systems with no memory protection.
crypto_sign_open() and crypto_sign_edwards25519sha512batch_open() now accept a NULL pointer instead of a pointer to the message size, if storing this information is not required.
The close-on-exec flag is now set on the descriptor returned when opening /dev/urandom.
A libsodium-uninstalled.pc file to use pkg-config even when libsodium is not installed, has been added.
The iOS target now includes armv7s and arm64 optimized code, as well as i386 and x86_64 code for the iOS simulator.
sodium_free() can now be called on regions with PROT_NONE protection.
The Javascript tests can run on Ubuntu, where the node binary was renamed nodejs. io.js can also be used instead of node.
下载地址：https://github.com/jedisct1/libsodium/releases/download/1.0.2/libsodium-1.0.2.tar.gz
来自:开源中国社区
