Express
POS Outage Continuity
A retail POS that loses internet mid-shift continues processing card purchases via the paired mobile, within the active trust window.
When connectivity drops, transactions shouldn't stop. This patent lets a POS and a paired mobile phone verify and approve credit card purchases locally — using NFC, cached credit data, and a time-bounded trust window.
Point-of-sale systems depend on a live connection to approve credit cards. When that connection fails, merchants face a binary choice: reject every transaction, or accept them all on blind faith — with no fraud protection whatsoever.
A pre-registered "trusted pair" — POS and mobile — turns the customer's phone into an offline approval engine. When both devices lose connectivity, they communicate over NFC. The phone, using cached credit data, decides whether the purchase is safe.
The system runs across two communication layers: NFC for local, real-time approval between POS and phone; and internet for eventual settlement with the bank. The two channels never need to be active simultaneously.
When the POS detects no internet, it sends an NFC connection request to the paired phone. The phone responds with a data packet identifying a portion of the credit card. The POS verifies the match, then transmits the purchase amount for evaluation.
Neither the full card number nor raw credentials are sent — the protocol verifies enough to confirm identity without exposing sensitive data over the air.
This is the core security gate. The phone tracks how long it has been disconnected from the internet. If the offline duration exceeds a configured threshold, it sends a deny instruction — regardless of card validity or purchase amount.
The time boundary prevents a lost or stolen device from acting as an indefinite offline approval engine. Trust expires by design, not by accident.
If the trust timer clears, the phone checks its cached credit data. The purchase must fall below a predetermined percentage of the card's available credit. This cap is intentionally conservative — a fraction of the limit, not the full limit.
The threshold limits financial exposure from any single offline approval session — shrinking the blast radius if a compromised pairing is ever exploited.
After an offline approval, the phone stores the complete transaction record: credit card information, purchase amount, and the merchant identifier. The moment internet is restored, it transmits the bundle to the bank for settlement.
Anywhere connectivity is intermittent — retail outages, rural merchants, stadiums, aircraft — the trusted pair keeps transactions flowing without abandoning security or settlement accountability.
The offline payment model — NFC-gated, time-bounded, edge-cached — has drawn attention from fintech security researchers and payment networks operating across three continents.