Letting the issuer to deal with all security issues involved eases the process of integration, migration, merger, federation or building cloud applications.
取而代之的是让授权机构处理所有安全问题，包括简化集成、迁移、合并、联合或创建云应用程序的过程。
2
In addition, a hybrid cloud or virtual private cloud implementation would require a cross-domain single sign-on option, therefore federation will play a role as well.
此外，混合云或虚拟私有云实现都要求使用跨域的单点登录方法，因此联合机制也会在这里发挥重要作用。
3
In the cloud, these attributes and role memberships are decoupled from the operating system and can be distributed across systems via federation.