基于组合密钥的密文全文检索的分词加密方案设计

A Design based on the Combination Key to Encrypt Word Segmentation in the Full-ciphertext Retrieval System

密文全文检索系统在不解密的情况下对密文进行检索，索引分词密文必须与检索的分词密文一致。基于对系统安全性的要求，如果每个分词使用不同的密钥进行加密是最安全的，但这会带来密钥数量庞大且不利于管理的问题。本文在此基础上，提出一种使用组合密钥的方案解决这一问题。

Retrieval ciphertext in a no decrypt full-ciphertext retrieval system, the index of participle ciphertext and retrieval of participle ciphertext must be the same.Based on the security of the system requirements,each word segmentation using different key encrypt is safest in theory,but there is a problem which it will bring key large quantities and not conducive to the management issues.On this basis, this paper advances a key solutions to use the combination for solving this problem.