1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
+---------------------+ +----------------------+
| | | |
| | | |
| Device | | Reader |
| | | |
| | | |
+---------+-----------+ +----------+-----------+
| |
Initialize session |
| |
| |
Create QR code engagement |
| |
+-------------+ |
| | |
| | |
<-------------+ |
| |
| Send QR code |
+----------------------------------------------------------------->
| |
| | Establish session
| +-----------+
| | |
| | |
| +-----------+
| Request age_over_21 |
<-----------------------------------------------------------------+
| |
| |
| |
| Send age_over_21 |
+----------------------------------------------------------------->
| |
| |
| | Process age_over_21
| +-----------+
| | |
| | |
| +-----------+
| |
| |
| |
| Session finished |
| |