I'm a computer science undergraduate who participated GSoC 2017. I was
involved in implementing WS-Trust implementation for WSO2 Identity server.
In addition to that I worked on XACML, SCIM, SAML etc. features on WSO2
Since OpenID Connect is increasingly used I suggest that you can include
OLTU-37  (OpenID Connect Implementation) in GSoC 2018 project ideas
Please consider including any other project ideas to GSoC 2018 ideas list.