Method for managing a return of a product for analysis and corresponding product

A product, comprising:

• an integrated circuit configured to operate, in response to each reset or power-up, in a bootstrap mode with debugging prohibition or in an analysis mode with debugging authorization, wherein the integrated circuit comprises:
• a test access port;
• and
• a control circuit configured to:
• place the integrated circuit in the bootstrap mode with debugging prohibition in response to each reset or power-up of the integrated circuit and in an absence of a reception, on the test access port, of a first command accompanied by a first valid password;
• and
• place the integrated circuit in the analysis mode with debugging authorization in response to the reception, on the test access port, of the first command accompanied by the first valid password following the reset or the power-up of the integrated circuit, wherein placing the integrated circuit in the analysis mode with debugging authorization is maintained at least as long as a second command accompanied by a second valid password has not been received on the test access port, wherein placing the integrated circuit in the bootstrap mode with debugging prohibition and placing the integrated circuit in the analysis mode with debugging authorization are performed in response to a determination that the integrated circuit has never before been placed in the analysis mode with debugging authorization.