14. A method to control access to information, the method comprising: computer hardware generating a modified list of index terms by encrypting one or more tokens occurring in a first type of field of a first document using a first set of encryption settings; the computer hardware executing an indexing step using the modified list of index terms; the computer hardware generating a modified list of search terms by adding to a list of search terms one or both of 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 the first type of field, the computer hardware adding to the modified list of search terms an encrypted version of a search term included in the 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 an unencrypted or an encrypted version of that search term is found in the index terms associated with the first document.
14. A method to control access to information, the method comprising: computer hardware generating a modified list of index terms by encrypting one or more tokens occurring in a first type of field of a first document using a first set of encryption settings; the computer hardware executing an indexing step using the modified list of index terms; the computer hardware generating a modified list of search terms by adding to a list of search terms one or both of 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 the first type of field, the computer hardware adding to the modified list of search terms an encrypted version of a search term included in the 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 an unencrypted or an encrypted version of that search term is found in the index terms associated with the first document. 18. The method of claim 14 , the method further including: a computer hardware determining that a user has authorization to view a first type of field, based on a second degree of authorization of the user; and the computer hardware generating a modified list of search terms by adding second additional search terms to the list of search terms, based on the second degree of authorization of the user to view the first type of field, wherein the second additional search terms are encrypted search terms created using the first set of encryption settings.