United Access is a value added reseller for all kind of memory products starting at the low end with e.g. SLE5528 or SLE5542 from Infineon Technologies with the synchronous protocol according to ISO/IEC 7816. Many standard readers (typically made for asynchronous smart cards with T=0 or T=1 protocol) also support these very popular cards (although not via PC/SC).
Infineon has discontinued SLE5528 and SLE5542 chips (end of life in 2014) - please contact us for a migration strategy!
The next level are telephony products like the Eurochip family from Infineon Technologies. These kind of memories are equipped with a special security algorithm optimized for secure counters (like money worth counters in public payphone systems). These kind of secure memories require so called Security Access Modules (SAMs) which are also provided by Infineon (based on SICRYPT platform). United Access has developed a key management system for the Infineon easySAM.
Atmel offers the so called CryptoMemory® product family (like the AT88SC1616C) which offers a cryptographic authentication and also emulates T=0 protocol. This feature enables developers to use standard PC/SC readers without proprietary synchronous protocol libraries.
United Access offers not only the simple hardware but also software and consultancy based on more than 20 years of experience within this area.