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Two-stage safety access system of passenger vehicle and access method thereof

A technology for safe access and passenger cars, applied in transmission systems, digital transmission systems, safety communication devices, etc., can solve the problem that the internal data of passenger car ECUs are easily modified maliciously, and achieve the effect of preventing malicious modification.

Pending Publication Date: 2021-01-05
FAW CAR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This only includes one layer of security access mechanism, which has a great security risk. If the security algorithm or parameters are cracked, the internal data of the passenger car ECU can be easily modified maliciously.

Method used

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  • Two-stage safety access system of passenger vehicle and access method thereof
  • Two-stage safety access system of passenger vehicle and access method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] combine figure 1 and figure 2 , the method for two security visits of a passenger car of the present invention is applied as follows on a certain vehicle type:

[0052] The external diagnostic equipment 2 is physically connected to the ECU1 in the vehicle, and the ECU1 in the vehicle is a body control system (BCM). Successful implementation of two-level security access. The method is as follows:

[0053] 1) The external diagnostic device 2 sends the command "Release the first-level security access" to the BCM, requesting a random seed;

[0054] 2) BCM returns a random seed to the external diagnostic device 2;

[0055] 3) The external diagnostic device 2 calculates the key key-2 of the first-level security access through the device h(seed, MASK) function, and sends it to the BCM;

[0056] 4) The BCM receives the first-level security access key key-2 sent by the external diagnostic device 2, and compares it with the first-level security access key key-1 calculated b...

Embodiment 2

[0067] combine figure 1 and figure 2 , a method for two security visits of a passenger car is applied on a certain car model as follows: the external diagnostic device 2 is physically connected to the ECU1 in the car, and the ECU1 in the car is an engine management system (EMS). Two-level security access failure embodiment (first level security access failure). The method is as follows:

[0068] 1) The external diagnostic device 2 sends the command "Release the first-level security access" to the EMS, requesting a random seed;

[0069] 2) The EMS returns the random seed seed to the external diagnostic device 2;

[0070] 3) The external diagnostic device 2 calculates the key key-2 of the first-level security access through the h(seed, MASK) function, and sends it to the EMS;

[0071] 4) The EMS receives the first-level security access key key-2 sent by the external diagnostic device 2, and compares it with the first-level security access key key-1 calculated by the in-vehi...

Embodiment 3

[0073] combine figure 1 and figure 2 , a double security access method for a passenger car is applied on a certain car model as follows: the external diagnostic device 2 is physically connected to the ECU1 in the car, and the ECU1 in the car is a keyless entry / start system (PEPS). Two-level security access failure embodiment (second level security access failure). The method is as follows:

[0074] 1) The external diagnostic device 2 sends a command to PEPS to request a random seed seed;

[0075] 2) PEPS returns the random seed seed to the external diagnostic device 2;

[0076] 3) The external diagnostic device 2 calculates the key key-2 of the first-level security access through the device h(seed, MASK) function, and sends it to PEPS;

[0077] 4) PEPS receives the first-level security access key key-2 sent by the external diagnostic device 2, and compares it with the first-level security access key key-1 calculated by the in-vehicle h(seed, MASK) function of PEPS. If ke...

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Abstract

The invention relates to a two-stage safety access system of a passenger vehicle. The system comprises a safety access system of an ECU in the vehicle and a safety access system of external diagnosisequipment. The external diagnosis equipment is physically connected with the in-vehicle ECU; after the external diagnosis equipment and the ECU in the vehicle judge that the first-stage safety accessis successful through the diagnosis command, the second-stage safety access can be carried out; and the ECU data in the vehicle is modified only after judging that the second-level security access issuccessful. According to the method, the important data of the controller in the passenger vehicle is protected by adopting a method of combining primary safety access and secondary safety access, sothat the internal data of the ECU of the passenger vehicle can be prevented from being maliciously modified.

Description

technical field [0001] The invention belongs to the technical field of safe access for passenger cars, and relates to a two-stage safe access system and an access method for a passenger car that are applied to external diagnostic equipment and a controller inside the passenger car for safe access. Background technique [0002] At present, the security access mechanism of most passenger cars is that the external diagnostic equipment and the passenger vehicle pass through a layer of security access. The ECU in the vehicle compares the key calculated by the external diagnostic equipment with the key calculated by itself to determine the external diagnosis. The legitimacy of the device, and then decide whether to perform the safe release operation. This only includes one layer of security access mechanism, which has great security risks. If the security algorithm or parameters are cracked, the internal data of the passenger car ECU can be easily modified maliciously. Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/64G06F21/60H04L9/08H04L9/32
CPCG06F21/64G06F21/604H04L9/0863H04L9/0869H04L9/3226
Inventor 荆伟陶英轩刘晓祥黄金山冯梓轩张晓光高家君梁亚丽马文峰李英
Owner FAW CAR CO LTD
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