p-adic chaos in random number generation: reference materials avail?

hi- continuing my braid group theory/crypto research (see my jan. thread)...am now working on problems of random number generation. i've only recently begun to explore p-adics, in the context of applying p-adic chaos to random number generation. however i'm stretching the limits of my amateur mathematics background and would appreciate help in finding (what I can't seem to find myself): online and offline introduction to p-adics. cheers- phillip