Multiple key encryption devices, multiple key decoding devices, multiple key encryption systems and program.

摘要

PROBLEM TO BE SOLVED: To commonly encode electronic data being the object of secrecy so that the electronic data can be decoded using an optional one in a plurality of pieces of different decoding key data.;SOLUTION: This multiple-key encoder has a means for accepting the input of the electronic data being the object of secrecy, a means for accepting the input of a plurality of pieces of electronic data used as decoding key information of the encoded electronic data, a means for dividing the electronic data being the object of secrecy into blocks with length equal to or below the fixed length, a means for determining a variable value in a distributed function for generating distributed data to generate the distributed function so that one or more of the encoded data to be distributed and generated become the decoding key data to the electronic data being the object of secrecy, a means for distributing and generating a plurality of pieces of distributed data by the generated distributed function to the electronic data being the object of secrecy, and a means for outputting the distributed data as the encoded data after combining the number of pieces of distributed data smaller than the number necessary for restoration of the secrecy by one.;COPYRIGHT: (C)2006,JPO&NCIPI