How to create a single login/registration system to use across all my websites

[mknee]

I want to build a single user management system that can be implemented across all my sites and allow me to spin new sites from.

I dont want to use a Facebook/Google login, I prefer to have my own.

Looked at openid but dont really understand it. Ideally, looking to build my own simple version but obviously need it to be secure and flexible.

Any ideas appreciated.

 

[VirtualGlobalPhone]

@ mknee ; Their are lots of developer who have developed multi-vendor and multi-domain based apps. What in particular you want to do with this platform of yours. If its something related to web hosting check whmcs.