The term missile defense system is identified in base64 scheme by the sequence bWlzc2lsZSBkZWZlbnNlIHN5c3RlbQ==, while the MD5 signature is equal to db47d7bc9e5595f1c751b94332e7f239. The ASCII encoding of missile defense system in hexadecimal notation is 6d697373696c6520646566656e73652073797374656d.