EP 1997058 A1 20081203 - METHOD AND SYSTEMS FOR LIMITING REPEATED ACCESSES TO AN ELECTRONIC DEVICE
Title (en)
METHOD AND SYSTEMS FOR LIMITING REPEATED ACCESSES TO AN ELECTRONIC DEVICE
Title (de)
VERFAHREN UND SYSTEME ZUR BEGRENZUNG WIEDERHOLTER ZUGRIFFE AUF EIN ELEKTRONISCHES GERÄT
Title (fr)
PROCÉDÉ ET SYSTÈMES PERMETTANT DE LIMITER LES ACCÈS RÉPÉTÉS À UN DISPOSITIF ÉLECTRONIQUE
Publication
Application
Priority
- EP 2007051457 W 20070214
- EP 06300278 A 20060323
- EP 07712221 A 20070214
Abstract (en)
[origin: WO2007107417A1] A system for limiting repeated accesses to an electronic device, particularly to an electronic device receiving power from an external source, is disclosed. According to this system, each consecutive access done to this electronic device in less than a predetermined delay increases a counter that value determines another delay during which electronic device is idle. Preferably, the delay during which electronic device is idle is an exponen- tial function of the counter value. Thanks to this delay, one can not reasonably determine the function of the electronic device by testing a great number of input values, preventing copying this device. According to the invention, the system for limiting repeated accesses to the electronic device comprises, a counter, a counter reset that maintains the value of the counter for a predetermined delay after the power off of the system, and a logic access circuit adapted to increase the value of the counter each time an access is done to the electronic device and to idle the electronic device for a delay depending upon the value of the counter.
IPC 8 full level
G06F 21/31 (2013.01); G06F 21/77 (2013.01)
CPC (source: EP)
G06F 21/31 (2013.01); G06F 21/77 (2013.01); G06F 2221/2135 (2013.01); G06F 2221/2137 (2013.01)
Citation (search report)
See references of WO 2007107417A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007107417 A1 20070927; CN 101405745 A 20090408; EP 1997058 A1 20081203; JP 2009530727 A 20090827
DOCDB simple family (application)
EP 2007051457 W 20070214; CN 200780010047 A 20070214; EP 07712221 A 20070214; JP 2009500797 A 20070214