34 lines
1019 B
Plaintext
34 lines
1019 B
Plaintext
- RFID confusion
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- passive 1-bit tags
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- ro/rw memory
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- state machines for permission checking
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- contactless smartcards (processor chip cards, ...)
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- processor chip cards
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- typically 8bit micrprocessor (e.g. 8051 based)
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- MMU (!)
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- typical configuration: 1k RAM, 32k Flash, 70k mask ROM
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- ISO 14443 "proximity cards"
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- 14443-1 (physical specification)
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- 13.56 MHz
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- 14443-2 (radio interface)
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- power transmission from reder (PCD) to card (PICC)
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- 13.56MHz +- 7kHz
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- field strength 1.5A/m to 7.5A/m (rms)
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- channel from reader to card
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- Type A: carrier modulation with 100% ASK, modified miller code
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- Type B: carrier modulation with 10% ASK, NRZ-L code
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- channel from card to reader
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- Type A: load modulation on subcarrier fc/16, OOK, manchester code
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- Type B: load modulation on subcarrier fc/16, BPSK, NRZ-L code
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- 14443-3 (anti collision)
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- biometric passport
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- technical view
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- iso 7816-4 command based processor chip card
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- iso 14443-{1,2,3,4} based RFID interface
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