Now 6213 visitors
Today:0 Yesterday:0
Total: 152347 212S 50P 4R
2026-10-20, Week 43
Member Login
TACT Journal Homepage
Call for Paper
Committee
Find My Paper
Author Homepage
Statistics & History
Welcome Message
Paper Procedure
FAQ
Paper Archives
Outstanding Papers
Program & Proceedings
Presentation Platform
Hotel & Travel Info
Photo Gallery
Scheduler Login
Seminar
Archives Login
Sponsors


















Virual Oral Question and Answer
IEEE/ICACT20260235 Question.4
Questioner: hovhannes.movsisyan@rau.am    2026-02-09 오후 9:03:43 		IEEE/ICACT20260235 Answer.4
Answer by Auhor hkr3.cse@gmail.com   2026-02-09 오후 9:03:43
In the reverse flow, the store scans a QR code to trigger a reward when a buyer returns a bottle. How does the system prevent fraudulent scans? For example, what stops a store owner from scanning the same QR code multiple times without actually receiving a physical bottle, or a user from duplicating a QR code to claim multiple rewards? All buying and selling information for each participant will be stored on the blockchain. When a QR code is scanned and a reward is claimed, that QR code becomes invalid, preventing it from being scanned or used again.

Select Voice