Why can I scan the code to complete the payment when the mobile phone clearly has no network?

Since Alipay and WeChat came into our lives, we seldom take cash out. Whether shopping or traveling, it is enough to open WeChat or Alipay to scan the code to pay. Whether online or offline, the payment functions of WeChat and Alipay are very convenient.

Then, has there ever been a case where the mobile phone has no network and the merchant still successfully completes the payment by scanning the code after showing the payment code? Next, Bian Xiao will tell you why this offline payment can still be successful.

This payment software is actually equipped with a special identification mark for each user, and our mobile phone will generate an offline code when paying without network. This offline code can also be paid. This payment method is called offline payment.

So how is this offline code generated? When we pay online, the identification system on the payment software will generate a two-dimensional code according to the relevant algorithm, seed data and time. This two-dimensional code is what we call offline code.

When the merchant scans the QR code, the service terminal will check the offline code. If the offline code comes from the consumer's mobile phone, the payment can be confirmed immediately. So as long as the merchant has a network, the code scanner can verify the identity of the consumer, and then the payment can be completed.

Does this offline code have security risks? What if someone else gets this offline code? Don't worry about this problem, because the offline code can only be generated through important links such as user identification and identity identification, and this QR code can only be used once and refreshed every 60 seconds, so the payment security problem can be guaranteed!