关键词: 无线传感网, 数据认证, 可逆信息隐藏

Abstract: The existing Reversible Data Hiding（RDH） schemes for the authentication of Wireless Sensor Network（WSN） have some disadvantages, for example, the watermarking cannot be embedded totally. Aiming at these disadvantages, this paper proposes an improved RDH scheme. This scheme divides dynamically the generator group using the synchronization point and the length controlling threshold, and generates the carrier group by the embedded authentication information capacity and the embedding strategy. In terms of the data types of WSN, a new method to predict the data element and a new prediction-error expansion equation are designed. Finally, the authentication information is embedded and extracted by using the RDH algorithm based on the prediction-error expansion. Experimental results and analyses demonstrate the proposed method has better performance on watermarking embedding and group division than the existing RDH schemes and traditional schemes.

Key words: Wireless Sensor Network（WSN）, data authentication, Reversible Data Hiding（RDH）