password format in update xml file

Hi

since Studio v2.1 the credentials to reach the update server are (at least) stored in:

/opt/vmware/var/lib/vami/update/provider/provider-deploy.xml

There is a value within which describes the password format:  "repositoryPasswordFormat" which is "base64" by default.

I wanted to know if there are other password formats supported and if so: which?

Thanks in advance

Thomas