Digital design includes two new designs. 1. WACS (weighted average chaotic system) which has been renamed and generalized as NLCS (Normalized linearly combined chaotic system) and 2.  FPCS (Flipped product chaotic system).

1.     M. S. Hasan, P. S. Paul, M. Sadia, and M. R. Hossain, “Design of a Weighted Average Chaotic System for Robust Chaotic Operation”, IEEE International Midwest Symposium on Circuits and Systems (MWSCAS), 2021.1.    

https://ieeexplore.ieee.org/abstract/document/9531758