It has been said that an electrical thermal noise source is more random than anything else in nature. By sampling a noise source voltage at any given snapshot in time one can create a random occurrence to be used as an encryption seed. Despite all the pseudo-random encryption efforts being designed into wireless and wired communication and computer networks, the codes can still be cracked. Using a true noise source is perhaps the only practical way to trump the hackers. Noise sources and modules are now being integrated into highly secure wireless handsets, PC's and network routers and switches.
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Link to Surface Mount Noise Diode data sheets |