With Infineon’s Solid Flash technology, the new security chip offers 700 kBytes of memory, a three-fold increase over alternative solutions, claims the manufacturer. In addition to the approximately 200 kBytes of space required for program code, the new SLE78 offers up to 500 kBytes of flash-based memory capacity for variable data, including electronic visas, hundreds of electronic entry and exit stamps and even loyalty points for frequent traveller programs.
Comparatively, alternative solutions based on ROM technology only provide a capacity of 144 kBytes. To process large amounts of data as quickly as possible at border controls, the new SLE78 security controller uses the VHBR (Very-High-Bit-Rate) protocol compliant to ISO/IEC 14443 with a 6.8 Mbit/s data rate (an eight-fold increase, says the manufacturer). In addition, the VHBR protocol improves the stability of contactless communication between the electronic passport and the corresponding reader. With Integrity Guard, data are not only stored in completely encrypted form but are also processed in encrypted form by two mutually monitoring CPUs.
The 16-bit security controller is available in various versions: as chip with a contactless interface or as dual-interface chip (SLE78CLFX500VPH) that combines both a contact-based as well as a contactless interface.
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