| crypto/rand | Package rand implements a cryptographically secure random number generator. |
| encoding/binary | Package binary implements simple translation between numbers and byte sequences and encoding and decoding of varints. |
| go.mau.fi/libsignal/ecc | Package ecc provides a way to generate, sign, and use Elliptic-Curve X25519 Cryptography keys. |
| go.mau.fi/libsignal/keys/identity | Package identity provides identity keys used for verifying the identity of a signal user. |
| go.mau.fi/libsignal/state/record | Package record provides the state and record of an ongoing double ratchet session. |
| time | Package time provides functionality for measuring and displaying time. |