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. 13, 2004
Filed:
Jan. 28, 1999
Ross J. Anderson, Bedfordshire, GB;
Markus Guenther Kuhn, Uttenreuth, DE;
Other;
Abstract
A set of methods is specified whereby software reduces compromising electromagnetic emanations of computers that could otherwise allow eavesdroppers to reconstruct sensitive processed data using periodic averaging techniques. Fonts for screen display of text are low-pass filtered to attenuate those spectral components that radiate most strongly, without significantly affecting the readability of the text, while the character glyphs displayed are chosen at random from sets that are visually equivalent but that radiate differently. Keyboard microcontroller scan loops are also furnished with random variations that hinder reconstruction of the signal emanated by a keyboard. Drivers for hard disks and other mass-storage devices ensure that the read head is never parked over confidential data longer than necessary.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile