News for hackers. Stuff that matters.

A comment on Offline card payments should be possible no later than 1 July 2026. Parent comment

Re:Offline card payments should be possible no later than 1 ... by mosdl on Friday October 03, 2025 @05:26PM (#45467992)
You don't need a blockchain for that, see how old credit cards worked without network access.
[ Parent | on HN ]
Re:Offline card payments should be possible no later than 1 ... by throw219080123 on Friday October 03, 2025 @05:31PM (#45468032)
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.

[ Parent | on HN ]