End user

(Resource Owner)

User-Agent

OIDC Client

OIDC Provider

IDP Service

Supplementary Service

(Resource Server)

1

1

2

2

4

OIDC GUI

re-direct

/authorize

3

4

re-direct

5

6

7

8

re-direct

9

9

re-direct

/authorize

sid

sid

sid

sid

sid