Patent ID: 7548618
Filing Date: 2009-06-16
Classification: H04L

Abstract:
1. A computer readable medium having stored thereon a converter using: an “n” (n≧1) number of conversion functions, F a binary exclusive OR operator, XOR: A×A→A; and a predetermined parameter, aεA, and said converter comprising: a generating unit accepting generative inputs, x a key accepting unit accepting key inputs, k a repetition controller giving the generative outputs from said generating unit as generative inputs to said generating unit, for an “m” (m≧0) number of times, and setting the last generative outputs as a random number sequence, r a data accepting unit accepting data inputs, d a converting unit converting the data inputs into data outputs, e outputting the data outputs; and wherein at least one of the conversion functions, F wherein the function, ma(•,•), is defined, by positive integers M, s, “M”-number system rounding up function, ceil(•), and “M”-number system rounding down function, floor(•), as: and the inverse function, ma −1 (•,•), is defined as: