// 1. Create instance of MilenageBufferFactory<BigIntegerBuffer> interface by
//    instantiating BigIngegerBufferFactory object.
MilenageBufferFactory<BigIntegerBuffer> bufferFactory = BigIntegerBufferFactory.getInstance();

// 2. Create instance of javax.crypto.Cypher from a key
//    using a helper class threegpp.milenage.cipher.Ciphers.

Cipher cipher = Ciphers.createRijndaelCipher(keyBytes);

// 3. Create OPc value from OP bytes and K, represented by the
//    previously created Cipher object.

byte [] OPc = Milenage.calculateOPc(opBytes, cipher, bufferFactory);

// 4. Create the Milenage instance for `OPc` and Cipher instances with MilenageBufferFactory.

Milenage<BigIntegerBuffer> milenage = new Milenage<>(OPc, cipher, bufferFactory);

// 5. Use the Milenage instance with input data (RAND, SQN, AMF)

try {
    Map<MilenageResult, byte []> result = melenage.calculateAll(rand, sqn, amf, Executors.newCachedThreadPull);

} catch(InterruptedException | ExecutionExceprtion e) {
// handle exception
}

// 6. Use the result

useMacA(result.get(MilenageResult.MAC_A));
useMacS(result.get(MilenateResult.MAC_S));
useResponse(result.get(MilenageResult.RES));
useConfinentialityKey(result.get(MilenageResult.CK));
useIntegrityKey(result.get(MilenageResult.IK));
useAnonimityKey(result.get(MilenageResult.AK));
useResynchAnonimityKey(result.get(MilenageResult.AK_R))