(國防科學技術大學 計算機學院,湖南省長沙市 410073)
摘 要:數據加密是保證數據安全的有效方法。本文針對傳統的密文檢索方法，設計了一種基于搜索歷史的密文檢索系統。分別構建文檔特征向量和用戶興趣向量，運用向量空間模型對其做相關性計算，返回用戶感興趣的檢索結果。并且能夠根據使用者的檢索歷史對興趣庫實現動態更新。實驗表明該方法能有效提高檢索結果的準確性。
關鍵詞：數據加密；密文檢索；特征向量；興趣向量；搜索歷史
Research on the Ciphertext Retrieval System Based on Search History
XIE Xian-Ming, WU Qing-Bo, TAN Yu-Son
(School of Computer, National University of Defense Technology,Changsha 410073, China)
Abstract: Data encryption is an effective way to ensure data security. Based on the traditional ciphertext retrieval technology, in this paper we design a ciphertext retrieval system based on search history. We set up document feature vectors and user interest vector, and do their correlation calculation by using vector space model, finally return the interested results for the user. We update the users' interest library dynamically according to the search history. Experiments show that the method can improve the accuracy of search results effectively.
Key words: data encryption; ciphertext retrieval; feature vector; interest vector; search history
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作者簡介：
謝賢明（1985-）男， 福建龍巖人，碩士，主要研究方向為隱私保護；
吳慶波（1969-）男， 浙江寧波人，碩士生導師，研究員，主要研究方向為操作系統；
譚郁松（1976-）男， 江西鷹潭人，副研究員，主要研究方向為操作系統。
