Abstract: Several post processing methods were theoretically analyzed in this thesis and a new post processing method for true random number generator was proposed. The random sequence after post processing meets the requirements of uniformity, independence, improve of entropy per bit. In case of arrays with bias digital noise, the above method is used. Moreover, randomness tests arc performed on the derived inner random arrays. I}he evaluate results show that this is a simple and effective post processing method that meets the rectuirements of small area and low power. The conclusion can be used in smart card.

Key words: Truly random number,Post processing,I3ias,Randomness test