pub type Nonce = [u8; 12];
Nonce for AEAD modes.
This is used by e.g. aes128-gcm@openssh.com/aes256-gcm@openssh.com and chacha20-poly1305@openssh.com.
aes128-gcm@openssh.com
aes256-gcm@openssh.com
chacha20-poly1305@openssh.com