| 摘要 |
The invention relates to a simple device (1) providing protection against fraudulent or accidental intrusion into at least one contactless communication object (3) having an intelligent circuit (31, 32) containing sensitive information or information providing access to services, whereby the electronic circuit of the protected object remains unchanged. The invention employs means (13) for receiving radio signals (S22) in a frequency range of the order of megahertz to tens of megahertz, the signals received generating the operating energy for activating a circuit (11) that generates an interfering signal to be emitted by emission means (14) belonging to the protection device in the form of interfering radio waves (S21) and interruption means (12) which validate or invalidate the operation of the interfering signal generator of the protection device. |
