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Automobile remote-control key-free door control identity authentication method

A technology for identity authentication and car remote control, which is applied in the field of identity authentication to achieve the effect of increasing hardware costs

Inactive Publication Date: 2010-10-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems in the existing car remote keyless identity authentication, the present invention provides a car remote keyless access control identity authentication method

Method used

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  • Automobile remote-control key-free door control identity authentication method
  • Automobile remote-control key-free door control identity authentication method
  • Automobile remote-control key-free door control identity authentication method

Examples

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Embodiment Construction

[0021] see figure 1 , the communication frame structure of the remote controller in the present invention is 128 bits, and the 128-bit plaintext is composed of two 64-bits, the former 64-bit is dynamic key encryption, and the latter 64-bit is plaintext. The plaintext of the first 64 bits of ciphertext is Sync: current synchronization code value, 38 bits; DFC: identification code, defined as the lower 8 bits of FID and the lower 8 bits of CID, a total of 16 bits; FC: function code, that is, the remote control Button combination code, 4 digits; Sy_e: synchronization code extension digit, 2 digits. The last 64 bits are FID: remote control ID, 28 bits; CID: car ID, 24 bits; Sy_l: the lower 10 bits of the synchronization code, the first frame is the synchronization code seed Sy_init when the remote control is registered; SC: status code, 2 bits . image 3 Register the flowchart in the car for the remote.

[0022] AES is a block cipher whose plaintext block is fixed at 128 bits, ...

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Abstract

The invention discloses an automobile remote-control key-free door control identity authentication method. In the invention, an automobile ID, a remote controller ID and a 38-bit synchronous code are used for generating a 128-bit plain text; the 128-bit plain text is composed of two parts, the front 64 bits are a plain text, and the rear 64 bits are a plain text; a 64-bit ciphertext is subject toAES encryption by using a 128-bit dynamic key; the 128-bit plain text is subject to AES encryption by using a fixed key to obtain a 128-bit ciphertext; the 128-bit ciphertext is transmitted to an automobile decoder; the automobile decoder decodes the received 128-bit ciphertext into the 64-bit ciphertext and the 64-bit plain text; a received automobile CID and a received remote controller FID arecompared with an automobile CID' and anremote controller FID' which are stored by the automobile, thereby completing a first authentication; and the dynamic key is used for decryption and compares identity codes to complete a second authentication. The invention protects the data transmission by AES encryption of the fixed key and the dynamic key, and can carry out authentication twice by only carrying out communication once in the whole authentication process. The invention can effectively resist strong attacks, and deny service attacks, impersonation attacks and other common attacks.

Description

technical field [0001] The invention relates to an identity authentication method, in particular to an identity authentication method for car remote control keyless access control. Background technique [0002] The existing car remote control keyless identity authentication system is vulnerable to attacks from car decoders and remote control jammers, and there are various security risks. Remote keyless entry system (RKE, Remote keyless entry system) and passive keyless entry system (PKE, Passive Keyless Entry System) in the field of automotive security applications refer to opening or closing the car door without physical contact with the car or trunk etc. The authentication system includes a decoder installed on the car and a remote controller carried by the user, and the system completes the operation through the communication between the remote controller and the decoder. RKE identity authentication is one-way communication between the car and the remote control, and PK...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08C17/02E05B49/00H04L9/06H04L9/16H04L9/32
Inventor 刘连浩王玲
Owner CENT SOUTH UNIV
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