Abstract: An authentication process receives information identifying a user, a device used by the user and a location in which the device is being used. That authentication process determines whether the location is among a set of familiar locations stored about the user for a service being accessed. If the location is not among the set of familiar locations, then the user is not authenticated. A desirable user experience can be obtained by using information about any existing relationship, such as a synchronization relationship, between the device and the service established at a prior familiar location. Instead of challenging a user whose device is in an unfamiliar location, the authentication process determines whether the device has a relationship established with the service. If the device has a relationship established with the service, then the set of familiar locations is updated to include the location in which the device is being used.

Abstract: An authentication process receives information identifying a user, a device used by the user and a location in which the device is being used. That authentication process determines whether the location is among a set of familiar locations stored about the user for a service being accessed. If the location is not among the set of familiar locations, then the user is not authenticated. A desirable user experience can be obtained by using information about any existing relationship, such as a synchronization relationship, between the device and the service established at a prior familiar location. Instead of challenging a user whose device is in an unfamiliar location, the authentication process determines whether the device has a relationship established with the service. If the device has a relationship established with the service, then the set of familiar locations is updated to include the location in which the device is being used.

Abstract: A method is disclosed for address book owners to link to a publisher's contact information profile, and establish an automatic updates relationship with the publisher. Upon establishing this relationship, when a publisher modifies his or her profile to reflect updated contact information, the publisher's updated profile information may then automatically be published to an address book owner's address book so that the address book owner's contact for the publisher is automatically updated to reflect the new information in the profile. Thus, the publisher's contact in the address book owner's address book may be automatically updated as a result of a publisher updating his or her profile, and without any action on the part of the address book owner.