| crypto/rand | Package rand implements a cryptographically secure random number generator. |
| crypto/subtle | Package subtle implements functions that are often useful in cryptographic code but require careful thought to use correctly. |
| errors | Package errors implements functions to manipulate errors. |
| golang.org/x/crypto/sha3 | Package sha3 implements the SHA-3 fixed-output-length hash functions and the SHAKE variable-output-length hash functions defined by FIPS-202. |
| internal/byteorder | Package byteorder provides functions for decoding and encoding little and big endian integer types from/to byte slices. |