Electronic information retention method/system, electronic information split retention method/system, electronic information split restoration processing method/system, and programs for the same

摘要

The invention aims to provide an electronic information split restoration processing method/system capable of processing massive electronic information at high speed while preventing leakage of the electronic information with reliability, and without causing deterioration in immediacy, centrally controlling electronic information to be processed by information processing units that are distributed geographically in a wide area, and connected via network. When electronic information is to be retained, a reversible split process and a reversible conversion process are applied to the electronic information (step S8), to thereby generate a plurality of split files (step S10), and store the split files together with dummy files (step S12). Split restoration information is generated (step S14) to be stored by relating processing information concerning the split and conversion process together with file names of the split files and information on storage destinations thereof, to data name of the original electronic information. When electronic information is to be read, split files are collected on the basis of the split restoration information (step S20) and the electronic information is restored by reversely applying the split and conversion process (step S22).