16 Broadband Wireless Access Network and mobile communication network); the focal study point is authentication algorithm; the cryptography (coding) is taken as the resear.

Combining the colour coding technology and colour printing,under the condition of anticorrosive cansed by non_panchromatic light,using the single_wavelength laser source and anticorrosive sensitive to blue light,the Fuller hologram masked by three primary colours is recorded in different areas of the same photographic plate by adopting the methods of density coding and partition recording.

A dense coding scheme which employs non-symmetric two-particle entangled state as quantum channel is advanced.

Drawing idea from the quantum secure direct communication(QSDC) and the dense coding,we propose a novel quantum secret sharing(QSS) scheme with high efficiency based on the GHZ states.

According to the theory that quantum entanglement can be used in quantum dense coding and increase the classical information capacity of a quantum channel, we discuss and compare the upper bound of capacity for dense coding in two case of using entangled input states and using product input states though a noiseless channel, when using a pure entanglement resource and get the result,i.