Stop Unwanted Callers From Ringing Your Telephone

Pin number based call blocking has probably been suggested more often than any other method for eliminating unwanted telemarketing and robotic telephone calls. In the past, pin number call blocking depended on software based pseudorandom number code generators to create pin numbers. Those generators have serious security flaws that weaken any call blocking method that relies on them. A very recent Intel advance in semiconductor technology has made a hardware based true random number generator possible and it is incorporated into this proposal for a pin number based call blocking system.