I am using Alfresco community edition 6.2.0. I need to know, is there any way to apply security on the model or custom type itself so that I can restrict the users from using that specific custom type. I come from a FileNet background, in FileNet, we can apply security on the Document Class level, is the same thing possible in Alfresco? I couldn't find any documentation related to it, so please help me.
Unfortunately, no. There are somewhat elegant ways to do this, though:
Apart from this, you could develop your own permissions, but this is a more serious customization.