WEIGHTED KEYWORD SEARCHING METHOD FOR PERSERVING PRIVACY, AND APPARATUS THEREOF

摘要

PURPOSE: A keyword searching method based on a weighted value and an apparatus thereof are provided to improve the accuracy of a searching result by executing a keyword searching for an encoded document by calculating high similarity. CONSTITUTION: A search token generating module(110) generates a search token by transforming information for a search keyword including a weighted value by confirming the weighted value according to information for the search keyword. A query and response receiving module(120) transmits a query message including the search token and decodes an encrypted document received as a search result. A verification module(130) verifies the justification of the search result by using the search token and information for a keyword included in a document extracted from the encrypted document. [Reference numerals] (110) Search token generating module; (120) Query and response receiving module; (130) Verification module; (200) Server; (AA) Search keyword; (BB) Weighted value