The ST23 contact series offers secure microcontrollers specifically designed for smartcard and secure authentication applications. They are based on ST's enhanced 8/16-bit CPU core and offer a wide range of memory sizes, cryptographic algorithms and interfaces.

As well as DES and AES cryptographic co-processors, the ST23 family comes with a Nescrypt public key co-processor including RSA and ECC algorithms and the optional Neslib certified crypto library.

Products are certified according to EMVCo and Common Criteria EAL5+/EAL6+ levels.