Abstract: Systems and methods are disclosed for transmitting encrypted information that is computationally secure, wherein the probability is exceedingly low that such transmitted information may be deciphered is a reasonable time period or with typical computer processing power. The advantageous combination of (1) memory modules containing separate lists of cipher keys useable for creating secure encrypted communications between known and approved secure devices, and (2) a cipher key-selection and corresponding code generation techniques implemented, partially or wholly, in hardware advantageously makes for an extremely computationally secure systems and methods of communication that is relatively low-cost.