his paper presents a reversible data hiding method based on wavelet spread spectrum and

histogram modification. Using the spread spectrum scheme, we embed data in the coefficients of integer

wavelet transform in high frequency subbands. The pseudo bits are also embedded so that the decoder does

not need to know which coefficients have been selected for data embedding, thus enhancing data hiding

efficiency. To prevent the overflow and underflow, an efficient histogram modification method is developed

and utilized. Experimental r-his paper presents a reversible data hiding method based on wavelet spread spectrum and

histogram modification. Using the spread spectrum scheme, we　embed data　in the coefficients of integer

wavelet transform in high　frequency subbands. The pseudo bits are also embedded so that the decoder does

not need to know which coefficients have been selected for data embedding, thus enhancing data hiding

efficiency. To prevent the overflow and underflow,　an efficient histogram modification method　is developed

and utilized. Experimental r