public byte[] encryptBytes(byte[] body) { try { ECPublicKey theirPublic = asymmetricMasterSecret.getDjbPublicKey(); ECKeyPair ourKeyPair = Curve.generateKeyPair(); byte[] secret = Curve.calculateAgreement(theirPublic, ourKeyPair.getPrivateKey()); MasterCipher masterCipher = getMasterCipherForSecret(secret); byte[] encryptedBodyBytes = masterCipher.encryptBytes(body); PublicKey ourPublicKey = new PublicKey(31337, ourKeyPair.getPublicKey()); byte[] publicKeyBytes = ourPublicKey.serialize(); return Util.combine(publicKeyBytes, encryptedBodyBytes); } catch (InvalidKeyException e) { throw new AssertionError(e); } }