On 14 Jul, 18:42, Tom Anderson wrote:
That article isn't outrageously detailed or specific, but taking it
together with the generic article on smart cards, i'd say that Oyster is
basically just memory, with a chip for accessing it and doing some
encryption. I would imagine it doesn't have firmware, BICBW.

Where do you think the encryption algorithm and the communication
protocol are stored? They're called "smart" because they have a
microprocessor running software that decodes commands and reads,
encrypts and transmits the requested data.

(Although whether this software is rewritable over the air is another
matter)

U

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