SECURE SMARTPHONE BASED ACCESS AND START AUTHORIZATION SYSTEM FOR VEHICLES

An access and start authorization system comprises: a transceiver-and-code-generator module that is configured to be installed in a vehicle, wherein the transceiver-and-code-generator module includes:a Bluetooth transceiver configured to establish a Bluetooth connection with a smartphone; a code generator that is configured to: communicate a secret key to one or more vehicle electronic control units while learning the code generator to the vehicle, subsequently use the secret key to encrypt communications between the code generator and the vehicle, and not store in code-generator memory the secret key in unencrypted form thereby preventing unauthorized access, via the code generator, to the secret key by a person who has access to the vehicle. 种访问和启动授权系统包括：收发器和代码生成器模块，其被配置为安装在车辆中，其中收发器和代码生成器模块包括：蓝牙收发器，其被配置为建立与智能电话的蓝牙连接；代码生成器，其被配置为：在向车辆学习代码生成器时将秘密密钥传送给个或多个车辆电子控制单元，随后使用秘密密钥将在代码生成器和车辆之间的通信加密，并且不将未加密形式的秘密密钥存储在代码生成器存储器中，从而防止具有对车辆的访问的人经由代码生成器的对秘密密钥的未经授权的访问。