Classic Feistel Networks and various types of FN's are sequential in nature. has a good overview of different types. But is there a way we can do Feistel Networks in parallel and achieve good security bounds ?
- Hoang, Viet Tung, and Phillip Rogaway. "On generalized Feistel networks." Advances in Cryptology–CRYPTO 2010. Springer Berlin Heidelberg, 2010. 613-630.