Is there a way to protect Toyota/Lexus vehicles from CAN inverters (CAN attackers)?

Yes, there is.
However, it’s important not to rely on just one countermeasure, but to combine multiple measures based on the model and how the vehicle is used.

A CAN attacker is a method that targets door unlocking and starting by misusing the vehicle’s communications.
As a result, measures that only address the radio signal of the factory key may not be enough in some cases, so you need to focus on measures that stop unauthorized starting.

At LOGON, as an anti-theft solution for Toyota/Lexus vehicles, we organize and provide guidance by model—for example, the following types of measures.

• The security unit that suppresses unauthorized starting
• Alarm measures that notify you of anomalies
• Supplemental measures around keyless entry and smart access
• Additional measures tailored to your parking environment and usage

What’s important isn’t simply adding stronger equipment, but carefully addressing the points that are most likely to be targeted while maintaining a balance with everyday usability.
In particular, for vehicles such as the Land Cruiser, Alphard, Vellfire, and Lexus SUVs, the approach changes a bit from model to model.

Even if you’re unsure how much protection your own car needs, that’s okay.
We can organize the recommendations according to your vehicle model, storage environment, and preferences—so please consult us while first checking the security plan by model.

[2025 update]
Popular Toyota/Lexus models (Land Cruiser, Alphard, Lexus RX/LX, etc.) remain high in recent theft statistics and continue to be prime targets for the CAN invader. To suit each model we combine types that alert immediately against network-based intrusion (e.g., AUTHOR ALARM), types that prevent the door unlock itself from succeeding (KEYLESS BLOCK), and types that won't start without authentication (e.g., IGLA). Layering rather than relying on one measure makes thieves spend time and effort, preventing damage.

[A key point when choosing]
Even among products labelled as CAN invader countermeasures, real-world effectiveness varies. What is often overlooked is whether the mechanism depends on the vehicle's own communication state. Options that lock and unlock in conjunction with the keyless system depend on it, so if the communication is disturbed they may not behave as intended. What matters is whether the system can keep directly monitoring regardless of that state. Within what we have actually verified, the IGLA series meets this condition, and among them AUTHOR ALARM has a dedicated operating mode for CAN invader scenarios, which we consider the strongest countermeasure.