Payments via mobile at a point of sale from Privatbank

Privatbank apparently inspired by the startup Flattr ( http://flattr.com ) decided to quickly make an alternative service at home, positioning it as a replacement for POS terminals. Yesterday, the main private startup startup Alexander Vityaz presented a note on his blog where he briefly described the mechanism. The essence is as follows. The seller sends SMS messages of a certain format with the payer's phone number to the service number 7440, while the payer sends SMS to the same number 7440 with his card number + expiration date + cvv2. All operations go through https://www.liqpay.com. In general, here is a picture explaining the essence:
In general, the idea is interesting, and I think as soon as it is rolled in it will be possible to use it. In the meantime, everything is too damp and too many questions. Details in the blog post.