文档介绍:AbstractWiththeinformationage’scoming,eallwalksoflife,institutions,,,andinformationretrievaltechnologyhasalsomadegreatprogress,butourdataminingtechnologyintherelativelylatestartofthestudy,,,fileencryptionandkeymanagementsystem,press,storefileandaddressitquickly,-eeds,suchassomecertainpropertyvaluesoffile,,,hashmulti-,,itprovidesamulti-levelencryptionprotectionforimportanthigh-levelclassifieddata,itisdesignedinrationalstrategiestomanagethemulti-,andsupportdomainsearchandadvancedsearch,eventhereareonehundredthousanddocumentsintheamountofdata,:massivedata,storage,retrieval,invertedindex,security,XML目录摘要.................................................................................................................IAbstract.............................................................................................................................................................................(1)..........................