A Public Key Cryptography Based Algorithm for Watermarking Relational Databases

By introducing public key cryptography, a novel algorithm for watermarking relational databases is proposed. In this algorithm, asymmetric keys are used in insetting and detecting database watermark processes, and users canpsilat get anything of the private key copyright watermark information or destroy database watermark through public key. Watermark detection can be completed by the third party using public key without secret leaking, which can be applied to large-scale business. Experiment verifies the validity and security of database watermark algorithm in practice.