# Full WriteUp
Full Writeup on our website: [https://www.aperikube.fr/docs/csawquals_2018/sso](https://www.aperikube.fr/docs/csawquals_2018/sso)
-------------# TL;DR
This challenge consists in the analysis of an authentication flow based on the OAuth2.0 protocol (see *[RFC-6749](https://tools.ietf.org/html/rfc6749)* and *[RFC-6750](https://tools.ietf.org/html/rfc6750)*).
The task was not that complex, it was only a matter of careful analysis of RFCs in order to solve the challenge