Implementing hacking detection and block function at indeterminate times with priorities and limits
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United States of America Patent
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Feb 26, 2013
Grant Date -
Aug 23, 2012
app pub date -
Feb 22, 2011
filing date -
Feb 22, 2011
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and circuits for implementing a hacking detection and block function at indeterminate times, and a design structure on which the subject circuit resides are provided. A circuit includes an antenna wrapped around a dynamic bus inside circuitry to be protected. The antenna together with the dynamic bus node is designed so an average bus access activates a field effect transistor (FET) that is connected to a capacitor. The FET drains the capacitor in a specified number of activations by the antenna. The capacitor has a leakage path to a voltage supply rail VDD that charges the capacitor back high after a time, such as ten to one hundred cycles, of the dynamic bus being quiet. The capacitor provides a hacking detect signal for temporarily blocking operation of the circuitry to be protected responsive to determining that the dynamic bus is more active than functionally expected.
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