Method for detecting potentially suspicious operation of an electronic device and corresponding electronic device
AssigneesSTMicroelectronics (Rousset) SAS, STMicroelectronics S.r.l.
InventorsMarco Bildgen, Jean Devin
Life of this patent
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Abstract
A method may be for detecting potentially suspicious operation of an electronic device configured to operate in the course of activity sessions. The method may include within the device, a metering, from an initial instant of the number of activity sessions having a duration below a first threshold, and a comparison of this number with a second threshold.
Claims26
A method for detecting unauthorized operation of an integrated circuit (IC) card for a television set-top receiver operating based upon a plurality of activity sessions, the method comprising:
- in the IC card, measuring a time duration of each activity session;
- in the IC card, measuring a number of activity sessions each having a time duration below a first threshold, each activity session starting with an initialization signal and associated with a respective channel;
- and
- in the IC card, comparing the number of activity sessions having the time duration below the first threshold with a second threshold.
An integrated circuit (IC) for an IC card for a television set-top receiver comprising:
- a processor configured to operate based upon a plurality of activity sessions, each activity session starting with an initialization signal and associated with a respective channel;
- a monitor circuit configured to
- measure a time duration of each activity session, and
- measure, in the plurality of activity sessions, a number of activity sessions having a time duration below a first threshold;
- a memory configured to store a value representative of the number of activity sessions having the time duration below the first threshold;
- and
- a comparator configured to compare the number of sessions having the time duration below the first threshold with a second threshold.
An integrated circuit (IC) card for a television set-top receiver comprising:
- a processor configured to
- operate based upon a plurality of activity sessions, each activity session starting with an initialization signal and associated with a respective channel,
- measure a time duration of each activity session, and
- measure a number of activity sessions having a time duration below a first threshold;
- a memory configured to store a value representative of the number of activity sessions having the time duration below the first threshold;
- and
- a comparator configured to compare the number of sessions having the time duration below the first threshold with a second threshold.
An integrated circuit (IC) for a television set-top receiver comprising:
- a processor configured to
- operate based upon a plurality of activity sessions, each activity session starting with an initialization signal and associated with a respective channel,
- measure a time duration of each activity session, and
- measure a number of activity sessions having a time duration below a first threshold;
- a memory configured to store a value representative of the number of activity sessions having the time duration below the first threshold;
- and
- a comparator configured to compare the number of sessions having the time duration below the first threshold with a second threshold.
Dependencies are inferred from the claim text.