Demand is now we have a, b two systems

1. A system through the link to jump to jump to b b system link with encrypted user name http://b.com? The username=XXX

2. B system check after receipt of the request decrypt username database in system b then through this account in system login system use b b is spring security

Spring security, I've never used, there is a great god with me do a similar needs better instruct me or send a demo,,