# Introduction This specification describes a way to decouple protocol-level obfuscation from an application's client/server code, in a manner that promotes rapid development of obfuscation/circumvention tools and promotes reuse beyond the scope of the Tor Project's efforts in that area. This is accomplished by utilizing helper sub-processes that implement the necessary forward/reverse proxy servers that handle the censorship circumvention, with a well defined and standardized configuration and management interface. Any application code that implements the interfaces as specified in this document will be able to use all spec compliant Pluggable Transports. ## Requirements Notation The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in \[RFC2119\].