关键词: 数字指纹, 正交编码, 编码效率, 均衡不完全区组设计

Abstract: To improve the performance of coding efficiency and reduce storage space, a new fingerprinting scheme was proposed. First, multiple linear block codes were designed, and then orthogonal vector of each symbol was connected to form user's fingerprinting. Compared with the orthogonal coding fingerprinting and orthogonal fingerprinting based on Balanced Incomplete Block Design (BIBD), the proposed scheme improves coding efficiency to some extent and reduces storage space to O(logn) for each fingerprinting. The theoretical analysis and the experimental results show that the approach is of robustness, and has good anti-collusion performance.

Key words: digital fingerprinting, orthogonal coding, coding efficiency, Balanced Incomplete Block Design (BIBD)