公开(公告)号：US07904796B2

公开(公告)日：2011-03-08

申请号：US12848731

申请日：2010-08-02

Applicant: Thomas M. Forest ,  Kerfegar K. Katrak ,  James K. Thomas

Inventor： Thomas M. Forest ,  Kerfegar K. Katrak ,  James K. Thomas

IPC: G06F11/10

CPC classification number: H04L1/0061 ,  H04L2001/0094

Abstract: A method is provided for formatting a message, with a first plurality of bits forming a data component, and a second plurality of bits forming a reserved component, for transmission in a vehicle. The method comprises the steps of calculating an initial checksum from the data component, calculating a revised checksum at least from the initial checksum, and storing the revised checksum in the reserved component. The number of bits in the reserved component is less than the number of bits in the data component.

公开(公告)号：US07231041B2

公开(公告)日：2007-06-12

申请号：US10643436

申请日：2003-08-19

Applicant: Thomas M. Forest ,  Thomas E. Utter

Inventor： Thomas M. Forest ,  Thomas E. Utter

IPC: H04L9/00 ,  G05B15/02 ,  G05B19/18 ,  G05B9/02 ,  G05B15/00 ,  G05B21/00 ,  G05D7/00

CPC classification number: B60R25/24 ,  G07C9/00182 ,  G07C2009/0023 ,  G07C2009/00793

Abstract: Methods and apparatus are provided for sending an encrypted command message from a remote keyless entry device to a receiver in a motor vehicle. The method comprises defining a key generating key within the remote keyless entry device, and using that key generating key to generate a working key. The working key is transmitted from the remote keyless entry device to the receiver during a training session without transmitting the key generating key. The working key is modified each time the remote keyless entry device is placed in the training mode. After the training session, a message encrypted with the working key can be transmitted from the remote keyless entry device to the motor vehicle receiver where the encrypted message is decrypted with the working key.

Abstract translation: 提供了用于将加密的命令消息从远程无钥匙进入装置发送到机动车辆中的接收器的方法和装置。 该方法包括在远程无钥匙进入装置内定义密钥生成密钥，并使用该密钥生成密钥来生成工作密钥。 工作密钥在训练会话期间从远程无钥匙进入装置发送到接收机，而不发送密钥产生密钥。 每次遥控无钥匙进入装置处于训练模式时，工作键被修改。 训练结束后，利用该工作密钥加密的消息可以从遥控无钥匙进入装置发送到加密消息用工作密钥解密的机动车辆接收器。