Also: Don't implement chacha20-poly1305 or AES-GCM yourself, unless you're a crypto expert. You'll more than likely make a mistake. Libsodium offers both (but

Also: Don't implement chacha20-poly1305 or AES-GCM yourself, unless you're a crypto expert. You'll more than likely make a mistake. Libsodium offers both (but AES-256-GCM is only available if you have hardware support for constant-time implementations). crypto_aead_chacha20poly1305_encrypt() crypto_aead_chacha20poly1305_decrypt() crypto_aead_aes256gcm_encrypt() crypto_aead_aes256gcm_decrypt() https://github.com/jedisct1/libsodium https://github.com/jedisct1/libsodium