QR Code Generate (How to protect hacking)

When I send object (have money valiable) from client to microflow for generate QR Code, But It has people use “Brup Suite” program to trap request and change number of money in money valiable before generate QRCode. So It make QRCode picture incorrectly and show number of money wrong.   How I solve this solution? Please help me. 
1 answers

I would not encode the value into the QR code. Instead, I’d generate it from a UUID, and I’d use that UUID to associate to a record that stores the value on a server I control. When the code is scanned, I then lookup that UUID and see what the value is, and if it’s been used cancel it so it can’t be used again.

Hope this helps.