The automotive market is undergoing a dramatic shift in how vehicles are accessed and how they are driven, and digital key technology is driving this change.
And now, as mechanical keys are phased out in favor of mobile-powered compliance applications, a major technological struggle is on the horizon between front-runner Ultra-Wideband (UWB), futuristic NearLink, and the newly-launched Bluetooth 6.0. Each has unique pros and cons, as each is an excellent direction forward for safe and effortless vehicle access.
UWB, which brands such as BMW and NI have already implemented, will grow a staggering 354.6% YoY in 2024. Its main advantage is its high-precision positioning, which it uses to offer centimeter-level accuracy for functionality such as automated parking, secure keyless entry etc.
UWB’s time-of-flight (ToF) ranging and strong security protections, such as cryptographic bound radio signaling, stop any relay attacks, which are a common threat in previous-generation keyless entry systems. This renders UWB being a solid competitor for quality and security-critical applications.
Backed already by Huawei, NearLink is poised for further development. Early indications in lab tests indicate that NearLink allows for positioning accuracy up to five times that of Bluetooth, and locking accuracy up to six times that. Its so wishes to eliminate the everyday issues with digital keys, such as doors not locking, with a level of stability and security.
Its emphasis on an open ecosystem – especially one that fits within the HarmonyOS ecosystem –could help give it traction in the Chinese auto market and beyond as an easy way to lock, unlock and share keys over-the-air.
The Bluetooth Technology Alliance was quick to follow in 2024 with Bluetooth 6.0, which introduced “Channel Sounding” for precision positioning. Digital Key accuracy is dramatically improved in Bluetooth 6.0 utilizing the combination of Phase-Based ranging and Round-Trip Time.
This version enforces stronger security against MITM and relay attacks which is why it is more stable as well. Planned for mass adoption between 2026-2027, Bluetooth 6.0 utilises its high market penetration in consumer electronics to provide an efficient digital key solution that is easy to deploy.
A BLE-NFC fusion is likely to still be a mainstay as I do not believe that NFC will disappear because of the UWB focus, however UWB, NearLink, and Bluetooth 6.0’s new features will change the digital key game. A decision to utilize one of these technologies is probably going to depend on the needed accuracy, security requirements, pricing, and ecosystem support.
With the booming digital key market expected to grow big, up to the scale of US$8.6 billion in 2030, continued advancements in these wireless solutions are sure to deliver a smarter, more convenient, and secure in-vehicle experience.