Where can I find open source code for Encryption Switching Protocol? The concept of Encryption Switching Protocols was introduced in CRYPTO. 

I was wondering if there is any pseudo-implementation of the protocol available or can I get some insights on how to implement it?
I am one of the authors of this paper. We did not implement encryption switching protocols, and as far as I know, they were never implemented. If you plan to implement them, I will be happy to answer questions about specific points. However, I cannot really give general insights about how to implement them: it's a long paper, with a relatively large number of rather complex constructions. The first step would probably be to implement our new variant of ElGamal - good implementations of the Paillier encryption scheme, which we also use, are already available.