Method and device for managing an array of keys, with protection against an active spy device, computer program product and storage means corresponding thereto
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 1, 2015
Grant Date -
Sep 11, 2014
app pub date -
Oct 29, 2012
filing date -
Nov 4, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
There is proposed a method of managing an array of keys by a device, each key pressed short-circuiting a row and a column of the array. During at least part of a time slot lying between two successive iterations of a sweep phase, the device performs a first protection mechanism, including reading a logic value on at least one row or column, and detecting an attempted illicit sweep as a function of the logic value read, and/or a second protection mechanism, including writing an arbitrary logic value, equal to or different from the predetermined logic value, on at least one row or column, so as to prevent an attempted illicit sweep.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully