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US 2019/0355673 A1Published application
Electronic chip
AssigneeSTMicroelectronics (Rousset) SAS
InventorsAlexandre SARAFIANOS, Bruno NICOLAS, Daniele FRONTE
Life of this patent
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Abstract
The disclosure concerns an electronic chip including a resistive region and a first switch of selection of a first area in contact with the resistive region.
Claims25
An electronic chip comprising:
- a resistive region;
- a first contact area in contact with the resistive region;
- and
- a first switch configured to select the first contact area in contact with the resistive region.
1 more element
A method of protecting an electronic chip against an attack, the method comprising:
- selecting first and second contact areas coupled to respective first and second portions of a resistive region of the electronic chip;
- determining a measured resistance value of a portion of the resistive region between the first and second portions;
- and
- comparing with a threshold a difference between the measured resistance value and an expected value.
1 more element
An electronic chip comprising:
- a resistive region;
- a node;
- and
- a connection device configured to connect to the node a selectable number of first contact areas in contact with the resistive region.
1 more element
A device comprising:
- an electronic chip that includes:
- a resistive region;
- a node;
- and
- a connection device configured to connect to the node a selectable number of first contact areas in contact with the resistive region;
- and
- a selector configured to select the number of first contact areas.
4 more elements
A method of protecting a device against an attack, the method comprising:
- selecting a number of first contact areas coupled to respective portions of a resistive region of an electronic chip of the device;
- connecting the first contact areas to a node;
- determining a measured resistance value of a portion of the resistive region between the first contacts;
- and
- comparing with a threshold a difference between the measured resistance value and an expected value.
2 more elements
Dependencies are inferred from the claim text.