You don't need a blockchain for that, see how old credit cards worked without ne... | Hacker News

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		mosdl 5 months ago \| parent \| context \| favorite \| on: Offline card payments should be possible no later ... You don't need a blockchain for that, see how old credit cards worked without network access.

throw219080123 5 months ago [–]

I didn't say you need a blockchain. I just said a cryptographic protocol (mostly offline and unrelated to blockchain) would help to automatically and quickly detect and proof fraud.

The offline credit card system does not proof fraud but just has insurance.

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