| bcrypt | Package bcrypt implements Provos and Mazières's bcrypt adaptive hashing algorithm. |
| blowfish | Package blowfish implements Bruce Schneier's Blowfish encryption algorithm. |
| bn256 | Package bn256 implements a particular bilinear group at the 128-bit security level. |
| cast5 | Package cast5 implements CAST5, as defined in RFC 2144. |
| curve25519 | Package curve25519 provides an implementation of scalar multiplication on the elliptic curve known as curve25519. |
| md4 | Package md4 implements the MD4 hash algorithm as defined in RFC 1320. |
| nacl/box | Package box authenticates and encrypts messages using public-key cryptography. |
| nacl/secretbox | Package secretbox encrypts and authenticates small messages. |
| ocsp | Package ocsp parses OCSP responses as specified in RFC 2560. |
| openpgp | Package openpgp implements high level operations on OpenPGP messages. |
| openpgp/armor | Package armor implements OpenPGP ASCII Armor, see RFC 4880. |
| openpgp/clearsign | Package clearsign generates and processes OpenPGP, clear-signed data. |
| openpgp/elgamal | Package elgamal implements ElGamal encryption, suitable for OpenPGP, as specified in "A Public-Key Cryptosystem and a Signature Scheme Based on Discrete Logarithms," IEEE Transactions on Information Theory, v. |
| openpgp/errors | Package errors contains common error types for the OpenPGP packages. |
| openpgp/packet | Package packet implements parsing and serialization of OpenPGP packets, as specified in RFC 4880. |
| openpgp/s2k | Package s2k implements the various OpenPGP string-to-key transforms as specified in RFC 4800 section 3.7.1. |
| otr | Package otr implements the Off The Record protocol as specified in http://www.cypherpunks.ca/otr/Protocol-v2-3.1.0.html |
| pbkdf2 | Package pbkdf2 implements the key derivation function PBKDF2 as defined in RFC 2898 / PKCS #5 v2.0. |
| poly1305 | Package poly1305 implements Poly1305 one-time message authentication code as specified in http://cr.yp.to/mac/poly1305-20050329.pdf. |
| ripemd160 | Package ripemd160 implements the RIPEMD-160 hash algorithm. |
| salsa20 | Package salsa20 implements the Salsa20 stream cipher as specified in http://cr.yp.to/snuffle/spec.pdf. |
| salsa20/salsa | Package salsa provides low-level access to functions in the Salsa family. |
| scrypt | Package scrypt implements the scrypt key derivation function as defined in Colin Percival's paper "Stronger Key Derivation via Sequential Memory-Hard Functions" (http://www.tarsnap.com/scrypt/scrypt.pdf). |
| sha3 | Package sha3 implements the SHA3 hash algorithm (formerly called Keccak) chosen by NIST in 2012. |
| ssh | Package ssh implements an SSH client and server. |
| ssh/terminal | Package terminal provides support functions for dealing with terminals, as commonly found on UNIX systems. |
| twofish | Package twofish implements Bruce Schneier's Twofish encryption algorithm. |
| xtea | Package xtea implements XTEA encryption, as defined in Needham and Wheeler's 1997 technical report, "Tea extensions." |