Abstract:

Proxy blind signature is widely applied to electronic voting, electronic commerce, and other network settings, etc. Combined with the situation of electronic bank payment, considering the correlative factors of the communication cost, the quantum operation complexity, and the verification efficiency, etc, the paper proposes a proxy blind signature scheme based on the single particle superdense coding to blind the classical double bits information. The principle of the scheme is that the classical bit information is transmitted to the quantum system using the measurement of single particle in different measurement bases, in which the owner of the message blinds the secret message first and then the proxy signer signs the blinded message after authorized. Under the situation of without considering the particles detection, compared with other current well-known schemes, the biggest advantage of the scheme is to save half of the particles at least. In addition, signature party only needs to measure single particle and the length of the signature is appropriate.The verification party only needs to verify by contrast, and not needs to carry out the particle operation. The efficiencies of the signature ,verification and communication are all improved.

Key words: quantum information, GHZ state, unitary operation, proxy blind signature