Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a collective address book system. One of the methods includes: receiving a request from a user to contact a person of interest; determining that contact information for the person of interest is not available in the user's contact information to which the system has access; determining that the collective address book system has access to contact information for the person of interest; generating proxy contact data for the person of interest; and providing the proxy contact data to the first user.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, sharing sensitive information with authorized individuals while reducing the likelihood that the sensitive information will be shared with unauthorized individuals. One of the methods includes receiving from a user an indication that a particular piece of information is sensitive information; automatically individually encrypting the sensitive information; automatically logging each access of the sensitive information; and reporting to the user that the sensitive information has been accessed, wherein the information management system to which the user indicates that a particular piece of information is sensitive information is the same information management system that reports to the user that the encrypted sensitive information has been accessed.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a collective address book system. One of the methods includes: receiving a request from a user to contact a person of interest; determining that contact information for the person of interest is not available in the user's contact information to which the system has access; determining that the collective address book system has access to contact information for the person of interest; generating proxy contact data for the person of interest; and providing the proxy contact data to the first user.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a collective address book system. One of the methods includes: receiving a request from a user to contact a person of interest; determining that contact information for the person of interest is not available in the user's contact information to which the system has access; determining that the collective address book system has access to contact information for the person of interest; generating proxy contact data for the person of interest; and providing the proxy contact data to the first user.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for resolving inconsistencies in information graphs.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, sharing sensitive information with authorized individuals while reducing the likelihood that the sensitive information will be shared with unauthorized individuals. One of the methods includes receiving from a user an indication that a particular piece of information is sensitive information; automatically individually encrypting the sensitive information; automatically logging each access of the sensitive information; and reporting to the user that the sensitive information has been accessed, wherein the information management system to which the user indicates that a particular piece of information is sensitive information is the same information management system that reports to the user that the encrypted sensitive information has been accessed.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for identifying user-specific values for entity attributes. One of the methods includes maintaining data representing a particular cluster of a plurality of claims about a particular entity, wherein each claim is an assertion by a respective claimant about an attribute value of the particular entity; receiving a request for a value of a particular attribute of the particular entity that has been submitted by a requesting user; determining, from attribute values for the particular attribute identified by the claims in the particular cluster, a user-specific attribute value for the particular attribute value; and providing the user-specific attribute value in response to the request.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for a collective address book system. One of the methods includes: receiving a request from a user to contact a person of interest; determining that contact information for the person of interest is not available in the user's contact information to which the system has access; determining that the collective address book system has access to contact information for the person of interest; generating proxy contact data for the person of interest; and providing the proxy contact data to the first user.