US Patent No. 9,288,211

PROVIDING ACCESS CONTROL FOR PUBLIC AND PRIVATE DOCUMENT FIELDS


Patent No. 9,288,211
Issue Date March 15, 2016
Title Providing Access Control For Public And Private Document Fields
Inventorship Andreas Arning, Tuebingen (DE)
Andrea E. Baader, Boeblingen (DE)
Thomas Schulze, Aidlingen (DE)
Sascha Schwarze, Hildrizhausen (DE)
Assignee GLOBALFOUNDRIES INC., Grand Cayman (KY)

Claim of US Patent No. 9,288,211

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.