Protecting secret data entry from infrared and audio...

Optical communications – Eavesdropping

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C726S002000, C340S540000, C713S183000, C379S035000

Reexamination Certificate

active

09396873

ABSTRACT:
A method for protecting a data entry device from eavesdropping includes masking a signature of entry resulting from entry of data by a user of the data entry device so as to reduce the detectability of the signature by eavesdropping. The signature may include a temperature differential in the data entry device from data entry by the user and the masking may include controlling the external temperature of the data entry device to reduce temperature differentials left in the data entry device by the user. Alternatively, the signature may include sound waves emitted from the data entry device and the masking may include masking sound waves emitted from the data entry device to reduce the detectability of the sound waves. A system may also be employed for protecting data entry to a data entry device from eavesdropping. The system includes a data entry device and means for masking a signature of entry resulting from entry of data by a user of the data entry device so as to reduce the detectability of the signature by eavesdropping.

REFERENCES:
patent: 4052720 (1977-10-01), McGregor et al.
patent: 4727655 (1988-03-01), Jacobi, Jr.
patent: 5025255 (1991-06-01), Mould
patent: 5075606 (1991-12-01), Lipman
patent: 5239792 (1993-08-01), Avni
patent: 5241699 (1993-08-01), Barsumian
patent: 5272754 (1993-12-01), Boerbert
patent: 5533131 (1996-07-01), Kury
patent: 5563182 (1996-10-01), Epstein et al.
patent: 5611608 (1997-03-01), Clausen
patent: 5748728 (1998-05-01), Ginsberg et al.
patent: 5761329 (1998-06-01), Chen et al.
patent: 5778081 (1998-07-01), Patrick
patent: 5828016 (1998-10-01), Grannan et al.
patent: 5828034 (1998-10-01), Chang
patent: 5872849 (1999-02-01), Sudia
patent: 5914701 (1999-06-01), Gersheneld et al.
patent: 6232994 (2001-05-01), Wiklof
Fan Noise Solutions; www.cpemma.co.uk, 2003.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Protecting secret data entry from infrared and audio... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Protecting secret data entry from infrared and audio..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protecting secret data entry from infrared and audio... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3942701

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.