Smart cards are a technology for carrying digital money
Memory cards: data storage space and password/PIN access
Shared key cards: contain a secret key and can exchange data with other cards sharing the key
Signature transporting cards: contain digital Ågblank checksÅh that can be used in transactions
They are large pregenerated random number sequences that can be assigned a denomination and signed
These are $1.50-$3.50 for the chips and production
Signature creating cards: can generate the random number sequences to use as checks
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