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. 04, 2005
Filed:
Sep. 20, 1999
Gary D. Martin, North Andover, MA (US);
Gary D. Martin, North Andover, MA (US);
Applied Micro Circuits Corporation, San Diego, CA (US);
Abstract
An encryption system has been provided to self-synchronously scramble communications where the receiver must recover the clock information from the data stream, such as the SONET format. To prevent jamming during initialization, or during times when no data is being transferred, flags and overhead data are scrambled, along with the payload. Timing controls to the scrambler permit this scrambler to be selectively engagable, so that the selective overhead scrambling becomes a second layer of scrambling. A method of self-synchronously scrambling the overhead in NRZ formatted communications is also provided.