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Jose Gutman, Jim Wright, Louis D Finkelstein, Larry Puhl: Electronic wallet. Motorola, Jose Gutman, William E Koch, Thomas G Berry, June 22, 1993: US05221838 (627 worldwide citation)

An electronic wallet includes memory for storing at least a balance corresponding to an account in a financial institution, and a selective call receiver for receiving a wireless message transmitted from a remote transmitter, the wireless message including financial information relating to the balan ...


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Thomas S Messerges, Ezzat A Dabbish, Larry Puhl: Method and apparatus for preventing information leakage attacks on a microelectronic assembly. Motorola, Terri S Hughes, K Cyrus Khosravi, September 25, 2001: US06295606 (66 worldwide citation)

An apparatus and method for preventing information leakage attacks on a microelectronic assembly is described for performing a cryptographic algorithm by transforming a first function, used by the cryptographic algorithm, into a second function. The method includes receiving (


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Stephen N Levine, Larry Puhl: Method of controlling communications in a cellular radiotelephone system. Motorola, F John Motsinger, January 8, 1991: US04984290 (33 worldwide citation)

A cellular system employs a subaudible signalling control protocol. The protocol includes transmitting supervisory related signals between the radiotelephone and one of the cell sites at a first subaudible digital bit rate, and transmitting data messages between the radiotelephone and said one of th ...


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Thomas Messerges, Ezzat A Dabbish, Larry Puhl, Dean Vogler: Domain-based digital-rights management system with easy and secure device enrollment. Motorola Mobility, March 1, 2011: US07899187 (10 worldwide citation)

New devices (101) are added to an existing domain by obtaining domain information (e.g., domain name and private domain password) from devices (101) already in the domain that preferably are in close proximity. Once the domain information has been transferred from the device already in the domain to ...


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Thomas Messerges, Ezzat A Dabbish, Larry Puhl, Dean Vogler: Digital-rights management system. Motorola, May 6, 2004: US20040088541-A1

Devices (101) are assigned a unique, unalterable, identification or serial number (313) that acts as the devices “electronic” biometric. Any certificate (302) created by a key issuer will contain the device's assigned DRM public key and the device's electronic biometric data. When a consumer wishes ...


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Thomas Messerges, Ezzat A Dabbish, Larry Puhl, Dean Vogler: Domain-based digital-rights management system with easy and secure device enrollment. Motorola, May 27, 2004: US20040103312-A1

New devices (101) are added to an existing domain by obtaining domain information (e.g., domain name and private domain password) from devices (101) already in the domain that preferably are in close proximity. Once the domain information has been transferred from the device already in the domain to ...


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Thomas S Messerges, Ezzat A Dabbish, Larry Puhl, Douglas A Kuhlman: Method for efficient hashing of digital content. Motorola, May 1, 2003: US20030084298-A1

A method of authenticating digital content of a digital object. Content is divided into portions or chunks. A chunk hash of each chunk is calculated to provide chunk hashes that are stored as entries in a hash table. The chunk hash entries of the hash table are in turn hashed to create an overall ha ...