METHOD FOR SHARING SECRET DOCUMENT BY USING SECRET SHARING SCHEME

摘要

PURPOSE: A secret document sharing method is provided to safely share a secret document among a group of users within a company by using a secret sharing scheme. CONSTITUTION: The method comprises plural steps. Shared secret keys are distributed to a group of users. An encrypted document is decrypted only if two more shared secret keys among the distributed shared keys are input. A system for implementing the method includes a system setting and management module(10), a central engine(20), an encryption module(30), a log-in management module(40), and a file monitoring module(50). The system setting and management module(10) distributes the secret keys. The central engine(20) controls security related elements of a document stored at the server. The encryption module(30) encrypts or decrypts the stored file by using a secret sharing scheme. The file monitoring module(50) monitors a file storage, copy or deletion process at the server.