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:
Apr. 15, 2014
Filed:
Jun. 29, 2012
Vinay Kumar Bannai, Sunnyvale, CA (US);
Henrik Boggild Kristensen, Sunnyvale, CA (US);
Sohail Mallick, Fremont, CA (US);
Jacqueline M. Zoucha, Sunnyvale, CA (US);
Raja Narayan, Sunnyvale, CA (US);
Curtis W. Dodd, Huntsville, AL (US);
Vinay Kumar Bannai, Sunnyvale, CA (US);
Henrik Boggild Kristensen, Sunnyvale, CA (US);
Sohail Mallick, Fremont, CA (US);
Jacqueline M. Zoucha, Sunnyvale, CA (US);
Raja Narayan, Sunnyvale, CA (US);
Curtis W. Dodd, Huntsville, AL (US);
ADTRAN, Inc., Huntsville, AL (US);
Abstract
An optical communication system has a transmitter that generates an optical signal containing payload data and security data. The transmitter double modulates an optical signal where payload data is in-band and security data is out-of-band. If a man-in-the-middle attack occurs and the intrusion device is unable to detect the out-of-band signal, the intrusion device will not replicate the out-of-band signal thereby allowing the presence of the intrusion device to be detected.