7. A method to control access to information, the method comprising: computer hardware determining that a first type of field of a first document has restricted access; the computer hardware generating a modified list of index terms by using a first set of encryption settings to encrypt one or more tokens included in the first type of field; the computer hardware executing an indexing step using the modified list of index terms; the computer hardware determining whether a user has authorization to view the first type of field based on a degree of authorization of the user; the 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; the computer hardware removing frequently used words from the modified list of search terms; responsive to a determination that the 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; the computer hardware executing a search using the modified list of search terms; and the computer hardware identifying a first search result that includes the first type of field, wherein the first type of field of the first search result includes a search term that is included in the modified list of search terms.
7. A method to control access to information, the method comprising: computer hardware determining that a first type of field of a first document has restricted access; the computer hardware generating a modified list of index terms by using a first set of encryption settings to encrypt one or more tokens included in the first type of field; the computer hardware executing an indexing step using the modified list of index terms; the computer hardware determining whether a user has authorization to view the first type of field based on a degree of authorization of the user; the 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; the computer hardware removing frequently used words from the modified list of search terms; responsive to a determination that the 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; the computer hardware executing a search using the modified list of search terms; and the computer hardware identifying a first search result that includes the first type of field, wherein the first type of field of the first search result includes a search term that is included in the modified list of search terms. 12. The method of claim 7 , the method further including: the computer hardware determining a degree of authorization of the user to view a decrypted term that corresponds to an encrypted term included in a document, wherein the encrypted term included in the document is included in the first type of field; and responsive to the determination that the user has authorization to view the decrypted term that corresponds to the encrypted term, the computer hardware replacing an instance of the encrypted term that appears in the first type of field of the document with the decrypted term.