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The Evolution of the Car Key
Connectivity: Opening the Door to New Mobility ExperiencesIn the past, automobiles served primarily as a means of transportation, relying on their own hardware and built-in function. Today, they are evolving into platforms that connect with smartphones, cloud services, a wide range of devices, and external systems. As connectivity technologies advance, enabling real-time data exchange between vehicles and their external environments, automobiles are becoming more than a means of transportation—they are digital platforms that deliver new functions and services.Alongside this shift, connectivity is becoming a core technology underpinning key vehicle functions and services. The range of functions enabled by connectivity is growing rapidly, from vehicle status monitoring and remote control to software updates and personalized services. According to McKinsey, more than half of new vehicles worldwide already offer some level of connectivity, and approximately 95% of new vehicles sold globally are expected to be connected by 2030.Connectivity now extends beyond in-vehicle systems to link vehicles with personal devices, including smartphones. As smartphones increasingly serve as primary interfaces for vehicles, digital technologies are playing a greater role in everyday use, including vehicle access and control. Digital Key is a prominent example of this shift. By enabling smartphones to function as vehicle keys, Digital Key brings vehicle-to-device connectivity directly into the user experience and is emerging as a key solution that changes how people access and use their vehicles.(New) A New Era of Vehicle Access: The Emergence of Digital KeyDigital Key is evolving beyond simply using a smartphone as a vehicle key toward delivering a more seamless and convenient vehicle access experience. Early Digital Key solutions were implemented using Near Field Communication (NFC), enabling short-range communication between a smartphone and a vehicle. CCC (Car Connectivity Consortium) Digital Key Release 2.0 also used NFC to support secure communication between smartphones and vehicles..CCC later introduced additional capabilities through Digital Key Release 3.0, leveraging Bluetooth Low Energy (BLE) and Ultra-Wideband (UWB). BLE is used to authenticate the Digital Key between the vehicle and mobile device, while UWB enables precise distance measurement between the two devices and determines the location of the mobile device. This allows users to access their vehicles or start the engine without taking out their smartphones, using Passive Keyless Access. Meanwhile, NFC continues to be supported to maintain backward compatibility and enable use when a smartphone’s battery is low. Rather than replacing one another, NFC, BLE, and UWB each contribute distinct capabilities that enhance Digital Key usabilityThe Digital Key certification ecosystem is also expanding. CCC announced that 115 vehicle and module products from automakers and component manufacturers obtained CCC Digital Key certification in 2025. In particular, the certification ecosystem expanded into a new market in 2025, when the first vehicles in China received CCC Digital Key certification.Market forecasts also point to further growth. According to CCC’s 2025 Future of Vehicle Connectivity Report, more than 10 million vehicles in each of Europe, North America, and China are expected to feature Digital Key capabilities by 2030. CCC members also identified BLE (84%), UWB (77%), and NFC (75%) as current priority technologies for advancing vehicle connectivity, and expect these technologies to contribute to the continued development of Digital Key and connected vehicle functions.Digital Key is therefore evolving beyond replacing physical vehicle keys with smartphones. By combining wireless connectivity with precise positioning technologies, it is moving toward a more seamless and intuitive vehicle access experience. At the same time, as the number of supported vehicles and modules continues to grow through standardization and certification, the Digital Key ecosystem is steadily expanding to enable reliable connectivity across a broader range of vehicles and mobile devices.Technology Requirements for a Smarter Digital KeyAs the applications of Digital Key continue to expand, the technologies supporting it must also meet a br➀ Interoperability Across Diverse Environments Digital Key is not a standalone product developed by a single company, but a solution enabled by the integration of technologies and products from various industry stakeholders, including automakers, smartphone manufacturers, and component and software companies. As a result, ensuring interoperability across different vehicle and device environments is becoming increasingly important for reliable and consistent functionality. CCC also identifies interoperability as one of the key objectives of its Digital Key standard, making it an important factor in strengthening the competitiveness of Digital Key.② Security Underpinning Trust in Digital Key For Digital Key, which controls vehicle access and vehicle start, security is a critical factor directly linked to product reliability and user trust. As vehicle access rights are digitally managed through smartphones, technologies that securely manage users’ authentication information and access privileges are becoming increasingly important, going beyond simply securing communication. Such security must also be consistently verifiable regardless of the vehicle manufacturer or device.③ Convenience and a Seamless User ExperienceWhile Digital Key began with the transition from physical vehicle keys to smartphones, the user experience is now evolving toward reducing the need for users to interact directly with the key itself. Beyond vehicle access and vehicle start, Digital Key is expanding into a wider range of everyday mobility use cases, including sharing vehicle access rights with other users and accessing rental or car-sharing services without in-person interaction. This highlights the growing importance of connecting technology with user experience rather than simply adding Digital Key functions, enabling users to use with Digital Key naturally without requiring additional steps or learning.LG Innotek’s Digital Key: Connecting People and VehiclesLG Innotek’s next-generation Digital Key Solution is a vehicle communication product that integrates more than 40 years of expertise in automotive wireless communication technologies. It incorporates short-range communication technologies including BLE, NFC, and UWB, with UWB playing a key role in accurately determining the location of a smartphone connected to the Digital Key. In addition, LG Innotek’s proprietary AI-based high-precision positioning algorithm is applied to accurately detect the smartphone’s location within a margin of error of 10 cm. This can help address positioning-related issues in conventional Digital Key systems, such as unintended door opening or Digital Key activation failures.In addition, the solution incorporates technologies designed to prevent hacking of wireless communications and significantly enhances security compared with long-range, cellular based communication. The anti-hacking technology enables the Digital Key function only on a smartphone authorized by the user. This can help address security vulnerabilities that have been identified as a concern in connected vehicles. Furthermore, the solution is designed to support use regardless of country, terrain, or vehicle type, while being compatible with both iOS and Android operating systems, thereby enhancing interoperability and convenience.In particular, LG Innotek’s next-generation Digital Key Solution can extend beyond vehicle access to sensing functions that enhance safety and convenience. One example is Child Presence Detection (CPD) using LG Innotek’s proprietary Radar technology, which detects the movement and subtle breathing of a child left inside a vehicle and can provide real-time alerts to the user based these signals. This expands the role of Digital Key beyond vehicle access and convenience to supporting safety both inside and outside the vehicle.Finally, LG Innotek’s next-generation Digital Key Solution is designed to be smaller than a business card, making it one of the smallest solutions in the industry. Despite its compact size, the solution integrates multiple components and modules, along with software developed in-house, providing differentiated customer value while increasing design flexibility for vehicle applications.LG Innotek: Beyond Digital Key Toward Future MobilityDigital Key is evolving beyond controlling vehicle locking and starting using smartphone to-vehicle communication and precise positioning technologies to become an interface that provides a range of secure vehicle functions and services. Building on its Digital Key technologies, LG Innotek is expanding its business scope to enhance user-context awareness and connectivity.In practice, LG Innotek is expanding its vehicle communication component portfolio with products that support vehicle connectivity and information processing, including 5G-V2X communication modules and automotive AP modules, alongside Digital Key. In particular, as various vehicle functions and services become increasingly connected through software in the era of SDVs (Software-Defined Vehicles), the importance of Connectivity technologies that enable information exchange among vehicles, external environments, and users is growing. LG Innotek aims to develop a Digital Key Solution that can be flexibly integrated into automakers’ SDV systems.With Digital Key as its foundation, LG Innotek is expanding its business into vehicle Connectivity Solutions encompassing communication, positioning, and sensing technologies to address the diverse connectivity requirement in future mobility environments.OutroThe evolution of Digital Key goes beyond a new way to access vehicles to create a new mobility experience that connects vehicles, people, and their surrounding environments. Going forward, vehicles are expected to evolve into platforms that recognize user context and surrounding environments in real time and connect seamlessly with a wide range of devices, services, and infrastructure.In response to these changes, LG Innotek continues to advance its capabilities in communication, positioning, and sensing technologies, as well as automotive communication modules. Building on the connectivity technologies developed through Digital Key, LG Innotek is moving beyond connecting vehicles and people to develop a Total Connectivity Solution encompassing devices, objects, and infrastructure.As the scope of vehicle connectivity continues to expand, LG Innotek plans to lead in core connectivity technologies shaping future mobility and deliver smarter vehicle experiences designed to maximize user convenience.
