	US 7,522,727 B2
	Method and apparatus for providing authentication in a communication system
Hans Christopher Sowa, Schaumburg, Ill. (US); Daniel J. McDonald, Cary, Ill. (US); David J. Chater-Lea, Crowthorne (United Kingdom); Scott J. Pappas, Lake Zurich, Ill. (US); Jason Johur, Maidenhead (United Kingdom); Dennis Newkirk, West Chicago, Ill. (US); Randy Kremske, Woodstock, Ill. (US); and Walter F. Anderson, Algonquin, Ill. (US)
Assigned to Motorola, Inc., Schaumburg, Ill. (US)
Filed on Aug. 31, 2006, as Appl. No. 11/468,851.
Application 11/468851 is a division of application No. 09/785722, filed on Feb. 16, 2001, granted, now 7,123,719.
Prior Publication US 2007/0098171 A1, May 03, 2007
Int. Cl. H04K 1/00 (2006.01); H04L 9/00 (2006.01)

U.S. Cl. 380—247 [380/248; 380/249; 380/258; 380/259; 380/260; 380/261; 380/262; 380/263; 380/264; 380/265; 380/266; 380/267; 380/268; 380/269; 380/270; 380/271; 380/272; 380/273; 380/277; 380/278; 380/279; 380/280; 380/281; 380/282; 380/283; 380/284; 380/285; 380/286; 713/161; 713/162; 713/163; 713/164; 713/165; 713/166; 713/167; 713/168; 713/169; 713/170; 713/171; 455/432.1; 455/432.2; 455/432.3; 455/433; 455/434; 455/435.1; 455/435.2; 455/435.3; 455/436]

13 Claims

1. A method comprising the steps of:

receiving, from a mobile station, a request to communicate in a communication system;

determining whether the request to communicate is encrypted;

when the request to communicate is not encrypted, sending a request to authenticate the mobile station to an infrastructure system device in the communication system;

when the request to communicate is encrypted, determining whether the mobile station is powering up;

when the mobile station is powering up and the request to communicate is encrypted, sending a request to authenticate the mobile station to the infrastructure system device in the communication system;

when the mobile station is not powering up and the request to communicate is encrypted, determining whether the request to communicate is encrypted using a valid key;

when the mobile station is not powering up and the request to communicate is encrypted using a valid key, permitting the mobile station access to the system without requesting authentication.