| crypto/rand | Package rand implements a cryptographically secure random number generator. |
| golang.org/x/crypto/blake2b | Package blake2b implements the BLAKE2b hash algorithm defined by RFC 7693 and the extendable output function (XOF) BLAKE2Xb. |
| golang.org/x/crypto/curve25519 | Package curve25519 provides an implementation of the X25519 function, which performs scalar multiplication on the elliptic curve known as Curve25519. |
| golang.org/x/crypto/nacl/secretbox | Package secretbox encrypts and authenticates small messages. |
| golang.org/x/crypto/salsa20/salsa | Package salsa provides low-level access to functions in the Salsa family. |
| io | Package io provides basic interfaces to I/O primitives. |