an image steganographic algorithm based on Pseudo Random Number(PRN) is proposed.The same Pseudo Random Number sequence is generated by Pseudo Random Number Generator(PRNG) in the parameter certain situation.To utilize this nature of PRNG
the Integer Pseudo Random Number(IPRN) is generated and regarded as an auxiliary pixels value.First
two secret information are hided to one IPRN and one pixel value
and then the secret information which is in the IPRN is displaced to the pixel value.In this way
the two secret information bits are embedded into the pixel value.This method's characteristic is that the capacity of steganography will be enhanced in one time.The experiment proved that this method has a very good security performance and the hiding capacity.