Safe and reversible relational database copyright protection technology

The invention relates to a safe and reversible relational database copyright protection technology, which solves the technical problems that a relational database easily generates data copyright disputes and damages the interests of owners, and comprises the following steps of: A, converting a watermark plaintext into a binary sequence; b, scrambling the watermark binary sequence by using chaoticencryption, and adding an error control code to the scrambled sequence to perform error control; c, respectively executing a watermark embedding program by taking each numeric attribute column with redundancy as a unit; determiing an embedded watermark tuple according to a personal private key of a database owner and an embedding proportion, determining a watermark bit value in a watermark information binary sequence selected in the embedding process according to the watermark length, and randomly selecting a numerical value bit to be modified. The safe and reversible relational database copyright protection technolog