Brake failure + privacy leak, how to dispel the car safety concerns caused by Tesla

Brake failure + privacy leak, how to dispel the car safety concerns caused by Tesla

According to the data from the Passenger Federation, with the continuous fermentation of a series of “accidents”, Tesla’s domestic sales of new energy passenger vehicles in April fell by 30% year-on-year. Although Tesla has made corresponding remedial measures after experiencing the “brake failure incident”, “charging anomaly incident” and “privacy security incident”, what this series of incidents brought to Chinese car users is to the car. Further attention to functional safety and information security.

Brake failure + privacy leak, how to dispel the car safety concerns caused by Tesla

Frequent talk about new functional safety

News of failed brakes and abnormal acceleration in electric vehicles now and then have raised concerns about the safety hazards of the car. In this regard, Chen Li, field application manager of ON semiconductor‘s China automotive market, said that if the phenomena such as brake failure and abnormal acceleration are caused by the automatic driving system’s misjudgment of actual traffic information, it is necessary to develop better algorithms to improve the car’s performance. Intelligent perception ability, improve functional safety level, etc. If this anomaly stems from the competition between autonomous driving and human driving for control of the vehicle, drivers should regulate their driving habits. At the same time, OEMs also need to add driver monitoring systems to keep driving records.

In order to ensure autonomous driving, many electric vehicles are now equipped with many sensors, such as cameras, millimeter-wave radars and lidars. Chen Li mentioned that this is the perception capability redundancy of autonomous driving. With the advantages of various sensors, the all-weather perception capability is enhanced. For example, the Xpeng P5 is equipped with the lidar of Lanwo Technology, a subsidiary of DJI, but the mass production of lidar has always been a problem. Chen Li believes that the current stage of lidar involves laser generation, beam orientation, photosensitive processing and corresponding back-end algorithms, and it still takes time for the entire ecosystem to mature. The bottleneck of mass production is that performance, cost and reliability have not yet reached a good balance point.

Waymo Self-Driving Road Test / Waymo

Another type of redundancy is complete system backup. When the main system is abnormal and cannot be recovered in a short time, the backup system can switch seamlessly. This is also related to the system functional safety level requirements. Dual system redundancy can meet the design requirements of functional safety automotive safety integrity level D (ASIL D). This redundant design is already used in ADAS or autonomous driving systems in many cars, such as Waymo’s critical safety systems. Waymo has added backups to systems such as computing, braking, steering, collision detection and obstacle avoidance. After one system fails, the second system can be seamlessly switched.

Another major car functional safety hazard is the car’s power supply. Previously, a Nanchang Tesla owner was unable to start because of charging, and Tesla has recently been claimed in Norway for reducing battery capacity and charging speed to ensure battery life. Power management has become a safety issue that cannot be ignored in new energy vehicles.

Peng Chao, field application manager of ON Semiconductor’s China automotive market, mentioned that the intelligence of smart cars is supported by powerful computing power, but computing power is proportional to power consumption. Therefore, the processor on the VCU side needs a safe, high-power and fast-response battery management system. At present, the main development breakthrough is functional safety and increased power density. ON Semiconductor also provides first-level PMUs, second-level multiphase buck controllers and smart power stages that meet different levels of functional safety ASIL. Compared with the solution of discrete power devices, the solution of multi-phase controller supporting intelligent power stage can significantly reduce the PCB area and improve reliability. It has been used in mainstream computing platforms and has been in mass production since the second quarter of last year. Model launched. In addition, ON Semiconductor has launched an integrated sensor-side power supply solution for the distributed power supply required by image sensors.


Part of the “Several Provisions on Automobile Data Security Management (Draft for Comment)” / Cyberspace Administration of China

The Cyberspace Administration of the People’s Republic of China recently issued the “Several Regulations on Vehicle Data Security Management (Draft for Comment)”, which mentioned that the data provided outside the vehicle should be anonymized and desensitized as much as possible. Article 12 of the draft adds that personal information or important data should be stored within the country according to the law, and if it is really necessary to provide it overseas, it should pass the data exit security assessment organized by the national cybersecurity and informatization department. That is to say, in order to facilitate the development of the domestic auto business, the best way for Tesla is to build a Tesla version of the “Cloud Guizhou” automotive data center in China like Apple.

Tesla immediately issued a supportive response after the release of the opinion draft. On May 25, Tesla officially issued an announcement announcing that it has established a data center in China to store data locally, only for measurements sold in the mainland Chinese market. In the future, Tesla will add more local data centers and open a vehicle information query platform to car owners.

In an interview with the Electronic Enthusiast Network, National Technology mentioned that the data desensitization mentioned in the draft refers to the technical processing of sensitive fields in the original data without affecting the accuracy of the data analysis results to reduce its data. Sensitivity, thereby reducing the risk of personal privacy exposure data processing technology. The purpose of desensitization is achieved through technical means such as replacement, filtering, encryption, masking or deletion, and the technical means used in anonymization or de-identification processing are similar. The encryption among them is a very critical and effective technical means.

When it comes to encryption, security chips are naturally indispensable. Car security chips with strong hardware encryption capabilities can quickly encrypt car user information or vehicle sensitive information. National Technology’s N32S032 security chip has obtained EAL5+ high-level security certification and AEC-Q100 Grade 2 vehicle certification at the same time, supports national secret and international encryption algorithms, and provides complete protection for ICV information security confidentiality and measurement user privacy .

In addition to desensitization and encryption of car information, information protection is also the top priority of car security. With the addition of intelligent automotive electronic units such as IVI, T-Box and ADAS, the original automotive electronic chips begin to have bottlenecks in computing resources and security capabilities. Attackers can easily attack and control car systems through connected vehicles. This also requires security mechanisms such as data encryption technology and digital signature technology to protect the safe operation of the vehicle. The N32G/N32L series general-purpose security MCU of National Technology integrates more than ten kinds of national and international cryptographic algorithms hardware acceleration engine and security unit, and has been applied in many vehicle scenarios such as IVI, navigation and driving recorder.


Even if a perfect plan is prepared for functional safety and information security, the safety problems of automobiles in use cannot be completely avoided, and the human factor is still the biggest safety hazard. The existence of these solutions is not to make the driver completely dependent, but to minimize the impact of human factors on safety. While we face car safety, car companies must also improve their own feedback systems to provide car owners with transparent safety data while ensuring privacy.

The Links:   G150XTN068 1MBH60-100

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