User registration in the DORII infrastructure involves all the steps and procedures of user’s registration to any grid infrastructure. The following sections provide the details of user registration. These details can be summarized in the following steps.

1. The user has to obtain a digitally signed certificate that is compatible with a valid Grid Policy Management Authority
2. The user has to apply for VO membership to one of the DORII related VOs, as presented in Virtual Organization table, via the VOMS Admin registration web interface
3. The user has to apply for membership to one of the Virtual Control Room (VCR) instances that are supported by the DORII project based on the VO that he belongs to.