Due to the existence problem and complexity on correlative detection

traditional digital fingerprinting schemes have low efficiency in construction and tracking. To solve this problem

a new fingerprinting scheme based on the FDM(frequency division multiplexing) technique is proposed in this paper. In this scheme

the digital fingerprinting

which is a random sample from Cosine signal with no spectral overlap

is embedded in the middle-frequency coefficients of the original image through the spreading sequences. The performance of anti-collusion by embedding algorithm is also analyzed so as to theoretically deduce the relationship between code length and user size. The experimental results demonstrate the feasibility and efficiency of the scheme.