It seems that
crypto_box_easy, generates a random nonce and appends it to the cipher text in libsodium.
I understand using the same nonce with the same key can be catastrophic with
salsa20poly1305, as such is it bad practice to re-use the same public/private (static)
curve25519 keys when using crypto_box_easy?
Is it enough to assume that libsodium will ensure a random nonce is always used, or should
curve25519 keypairs be regenerated on each use?