The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 2012
Filed:
Mar. 06, 2007
John P. Taylor, San Diego, CA (US);
John P. Taylor, San Diego, CA (US);
KYOCERA Corporation, Kyoto, JP;
Abstract
A communication protocol between a master device, such as a mobile phone, and a peripheral device facilitates authentication of the peripheral device. When a peripheral device is detected, the master device initiates a wake-up command to the peripheral device, transmits an authentication request command followed by challenge data to the peripheral device, and awaits responses from the peripheral device. The accessory receives the challenge data, performs a hash function on the challenge data, and generates response data. An authentication response type byte is sent to the handset followed by the response data. The handset compares the response data to pre-stored data that is associated with the challenge data. A match indicates that the accessory is authentic. The challenge/response data, also referred to as a plaintext/cyphertext pair, is pre-generated external to the handset using the hash function, then pre-stored in the handset.