Secure communication method for use in vehicle has new or updated programs provided with digital signature allowing checking by external trust centre for detection of false programs

摘要

The communication method provides secure exchange of data between processors and programs coupled by a data bus with data encoding and/or authentication, using a public key method with cryptographic keys embedded in the processors and the programs. One of the processors acts as a trust component, with new and/or updated programs only loaded in the databus system via the trust component and provided with a digital signature allowing checking for detection of false programs by an external trust centre, before generation of a key pair provided by a public key and a private key for the program.