	US 7,587,608 B2
	Method and apparatus for storing data on the application layer in mobile devices
Jochen Haller, Karlsruhe (Germany); and Luciana Moreira Sá de Souza, Karlsruhe (Germany)
Assigned to SAP AG, Walldorf (Germany)
Filed on Nov. 30, 2004, as Appl. No. 11/1,147.
Prior Publication US 2006/0129830 A1, Jun. 15, 2006
Int. Cl. G06F 21/00 (2006.01)

U.S. Cl. 713—182 [380/270]

20 Claims

1. A method comprising:

storing user-specific data for each of multiple users on a mobile personal device, wherein the user-specific data is accessible through a persistence layer on the mobile personal device;

associating the user-specific data for each of the multiple users with a user identifier for each of the multiple users;

storing the user identifier for each of the users on the mobile personal device;

receiving a request from one of the users having a first user identifier to operate an application of the mobile personal device, wherein the request includes access to the user-specific data associated with the first user identifier;

intercepting the request and determining whether to process the request using an access controller;

requesting the first user identifier responsive to the request to operate;

comparing the first user identifier to the stored user identifiers;

granting the request and enabling access to the user-specific data through the persistence layer if the first user identifier matches when compared against the stored user identifiers; and

operating the application of the mobile personal device with the user-specific data corresponding to the first user identifier.