| 摘要 |
The invention relates to an electronic circuit (30) comprising: a first r andom-access data storage element (14), a processing module (16) designed to delete the first storage element, and an access terminal (B4) which is conn ected to the processing module and receives a first power signal (VDD_BU) su pplied by a first power source (P, C1) external to the electronic circuit. T he circuit also includes a second random-access storage element (32) in whic h a key is stored, said key being used to encrypt the data, and a second pow er source (C2) which is built into the electronic circuit and supplies a sec ond power signal (VAl) to the processing module. The processing module is de signed to detect an unauthorised access attempt by comparing the first and s econd power signals and to delete the key when the processing module is powe red by the second power source.
|
