pub fn encrypt_recipient(
plaintext: &[u8],
recipient_public_key: &[u8; 32],
) -> Result<RecipientEncryptResult>Expand description
Encrypt data using recipient-based encryption (X25519 + HKDF + AES-256-GCM)
Returns: (mode_byte, ephemeral_public_key, nonce, ciphertext_with_tag)