A CERN indico account is mandatory for registration. In case you do not have an account yet, please follow these steps:
Create a CERN lightweight account using the CERN Website : https://account.cern.ch/account/Externals/
Activate account using the link in the mail you receive from the CERN account system.
Connect your new CERN account with the indico system by login at the indico page (https://indico.cern.ch).
