Providing access control for public and private document fields

A computer program product to control access to information, the computer program product comprising:

• one or more hardware computer-readable storage media and program instructions stored on the one or more computer-readable storage media, the program instructions comprising:
• program instructions to generate 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;
• program instructions to remove frequently used words from the modified list of search terms;
• and
• program instructions to respond to a determination that a user has authorization to view a first type of field of a first document by 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;
• program instructions to determine that a second type of field of a second document has restricted access, based on a second degree of authorization of the user;
• program instructions to generate 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
• program instructions to execute an indexing step using the modified list of index terms.

A computer system to control access to information, the computer system comprising:

• one or more computer processors;
• one or more hardware computer readable storage medium;
• program instructions stored on the computer readable storage medium for execution by at least one of the one or more processors, the program instructions comprising:
• program instructions to generate 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;
• program instructions to remove frequently used words from the modified list of search terms;
• and
• program instructions to respond to a determination that a user has authorization to view a first type of field of a first document by 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 program instructions further including:
• program instructions to determine that a second type of field of a second document has restricted access, based on a second degree of authorization of the user;
• program instructions to generate 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
• program instructions to execute an indexing step using the modified list of index terms.