This facet refers to the ability to limit user access to models or code, or to prevent accidental changes or updates to the referenced models. In addition to obfuscation (i.e., hiding sensitive information in a confidential model or generated code), and read-only/locked models, there are other types of security, such as role-based access control that use user rights to control access to different parts of a transformation, such as the metamodel. 

Comparison of Model Transformation Tools