PORTABLE DATA MEDIUM USING MICROPROCESSOR AND OPERATING BOTH IN CONTACT AND CONTACTLESS MODES

摘要

FIELD: computer engineering. SUBSTANCE: portable data medium incorporating provision for preventing contactless access to memory areas which are designed only for contact access has microprocessor, data input/output device, and memory that stores memory areas access conditions for different modes of operation. EFFECT: enhanced reliability. 10 cl, 5 dwg