STMicroelectronics Introduces ST54M Secure Chip With PQC for Mobile Services
STMicroelectronics has introduced the ST54M, a single-die mobile security platform combining an NFC controller, embedded secure element and eSIM support with a hardware accelerator for post-quantum cryptography (PQC). The device is designed to help OEMs integrate secure, contactless and connected services into future mobile products.
One Device for NFC, Secure Element and eSIM Functions
The ST54M integrates a contactless front end and a secure element in a 90-ball WLCSP package. It supports NFC reader/writer, card emulation and peer-to-peer communication modes, while also providing interfaces for embedded SIM applications and external subsystems.
The architecture targets mobile devices, wearables, smartwatches and other secure connected products. By combining NFC, secure-element processing and eSIM capabilities in one device, the ST54M is intended to reduce integration effort for manufacturers developing multi-service mobile platforms.
Supported application areas include mobile payment, public transit ticketing, access control, mobile identification, digital car keys, NFC charging and secure connectivity. The platform also supports Multiple Enabled Profiles for eSIM applications.
PQC Hardware Accelerator for ML-KEM and ML-DSA
A central addition in the ST54M is a hardware accelerator for the ML-KEM and ML-DSA post-quantum cryptography algorithms. These algorithms are specified in NIST FIPS 203 and FIPS 204 and are intended for key encapsulation and digital signatures respectively.
Post-quantum cryptography addresses the future risk that quantum computing could compromise widely used public-key cryptography. The migration is particularly relevant for products with long life cycles and for applications handling sensitive data that may need protection over many years.
The ST54M integrates a KECCAK hardware accelerator for NTT ML-KEM and ML-DSA algorithms. This enables PQC-related cryptographic processing within the secure element, rather than relying solely on software running on the host application processor.
Security Architecture for Connected Mobile Services
The secure element is based on a 32-bit Arm Cortex-M35P core and includes up to 4.5 Mbytes of flash memory, 150 Kbytes of user RAM and a 16-Kbyte cache. It supports secure-element operating systems, hardware-accelerated DES and AES, public-key cryptography and embedded SIM applications aligned with GSMA requirements.
The platform is specified with Common Criteria EAL5+/EAL6+ and EMVCo-related security capabilities. It also includes protection mechanisms intended to support resistance against side-channel and fault-injection attacks.
For OEMs, the practical relevance is that cryptographic agility can be designed into the device architecture at an early stage. This is increasingly important where mobile credentials, payment applications, identity functions or connectivity services must remain adaptable as security requirements evolve.
Enhanced NFC Performance and Low-Power Operation
On the NFC side, the ST54M includes active load modulation and an integrated step-up DC/DC converter with transmit output power of up to 3 W. The design is intended to support flexible antenna configurations, including small antennas or devices with metal frames.
Dynamic power control reduces output power when a card is close, supporting interoperability and standard compliance. The NFC controller also supports low-power modes, field and tag detection, and stable card-emulation performance, including when battery conditions are limited.
The device supports NFC Forum Type 1 to 5 tags, ISO/IEC 14443 Type A and B, ISO/IEC 15693, FeliCa and peer-to-peer communication based on ISO/IEC 18092.
Support for UWB-Based Secure Ranging
The ST54M can connect to an external UWB subsystem for secure ranging. This creates a technical basis for mobile access and digital car key applications that require the combination of contactless credentials, cryptographic protection and distance-aware authentication.
For product developers, the combination of NFC, eSIM, secure-element functions, UWB connectivity and PQC acceleration makes the ST54M relevant for mobile services that are expected to extend beyond payment and ticketing into digital identity, mobility and connected-device use cases.