Clone-resistant vehicular RKE by deploying SUC

Many automotive Remote Keyless Entry (RKE) systems have been successfully attacked in the last few years. The security of RKE systems is still a sensitive and crucial issue for vehicular industry. The problem needs to be essentially addressed by the fundamental fabrication weakness namely: "the manufacture can clone his own fabricated keys" and create equal units. This should not be possible. The fact that: "the only safe secret is the one which nobody knows" leads to proposing the fabrication of physically "Secret Unknown Cipher" (SUC) to serve as a clone-resistant security anchor (module) for the RKE system. Each fabricated key, in its ultimate case, is then equivalent to an individual unclonable DNA-like biological entity. We preset a protocol exhibiting mutual authentication properties to manage a complete RKE system. It is based on a digital hardware token incorporating an SUC module designed to fit to the vehicular industrial mass-production environment at reasonable costs.