Unduplicable quantum data medium based secret decryption and verification

In classical computer science any data that can be read can be copied an unlimited number of times. In the quantum world, the quantum states cannot be copied perfectly, according to the no-cloning theorem. The major difference between quantum and classical copy protection is the physical resource for data storage. The proposed quantum based data protection system lies in the fundamental difference between classical and quantum information. The classical data is stored in the secret rotation angles of non-orthogonal quantum states. In our paper we show that secret quantum decoding operations can be implemented with some associated error, which decreases exponentially with the number of quantum states of the angle state.