Patent ID: 9288211
Filing Date: 2016-03-15
CPC Classification: G06F,H04L

Claim Text:
1. A method to control access to information, the method comprising: a computer hardware generating a modified list of search terms by adding first additional search terms to a list of search terms, wherein the first additional terms include synonyms of the search terms and terms that are related to the search terms; the computer hardware removing frequently used words from the modified list of search terms; and responsive to a determination that a user has authorization to view a first type of field of a first document, the computer hardware adding to the modified list of search terms an encrypted version of a search term included in a list of search terms such that execution of a search using the modified list of search terms returns a result that identifies the first document as a search result when either the unencrypted or the encrypted version of the search term is found in a list of index terms associated with the first document; the computer hardware determining that a second type of field of a second document has restricted access, based on a second degree of authorization of the user; the computer hardware generating a modified list of index terms by encrypting one or more tokens occurring in the second type of field using a second set of encryption settings; and the computer hardware executing an indexing step using the modified list of index terms.