You can use the OpenAM-based authentication system to secure the RESTful web services. OpenAM is an open-source access management server that can connect to multiple identity repositories and provide authentication service. The identity repositories can be LDAP directories, relational databases, and Windows authentication. You can configure OpenAM to connect to an identity repository based on the authentication infrastructure of your environment. For example, you can configure OpenAM to connect to Kerberos Key Distribution Center (KDC) to use Kerberos authentication.