Patent ID: 7480798

Claim:
A method of authenticating an access request in a data processing system, comprising: receiving the access request, wherein the access request includes a group identifier and designates a resource to which access is requested; retrieving a complex group data object associated with the resource, wherein the complex group data object includes a group set value representing a plurality of requestor groups and a mask value, wherein the mask value masks out bits in the group identifier; and authenticating the access request based on the group identifier, group set value, and mask value, wherein authenticating the request based on the group identifier, group set value, and mask value includes: applying the mask value to the group identifier to generate a masked group identifier; and comparing the mask group identifier to the group set value; wherein comparing the masked group identifier to the group set value includes: applying the mask value to the group set value to generate a masked group set value; and comparing the masked group identifier to the masked group set value; if the masked group identifier matches the masked group set value, then the access request is authorized; if the masked group identifier does not match the masked group set value, then the access request is denied.