#taptopay — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #taptopay, aggregated by home.social.
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Alipay AI Pay processes 120 million transactions in one week as agentic commerce scales in China
https://fed.brid.gy/r/https://nerds.xyz/2026/02/alipay-ai-pay-agentic-commerce/
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The SeamChip payment system that was used in Craft Beer Helsinki at the time had a flaw. The cards in question were #MIFARE Ultralight EV1 48bytes, which had no real security. As it was used, it was possible to clone someone else’s card and use it to pay for your purchases. The system worked by associating the card to given account which you could then top up with "tokens". The purchase was still limited to the amount of tokens associated with the particular target account, and there was no option for using credit (buying alcohol on credit is highly regulated in Finland, and is basically only possible on credit with a credit card). Exploiting the flaw was also limited by the fact that you would need to find out the ID of the target card first, either requiring brute forcing or physically reading the victim’s card. Naturally abusing this flaw required that you had the knowledge and necessary tools to do so.
The SeamChip #RFID solution has since been discontinued, and has been replaced with regular payment methods. I’m definitely more confident in paying my beer with #taptopay