Wang, L., Dyer, K. P., Akella, A., Ristenpart, T., & Shrimpton, T. (2015, October). Seeing through Network-Protocol Obfuscation. In Proceedings of the 22nd ACM SIGSAC Conference on Computer and Communications Security (pp. 57-69). ACM.
In this paper the authors proposed a method to detect obfuscated packets(including those obfuscated by obfsproxy4) with high TPR and very low FPR(0.002). In the discussion section the writers mentioned "It is important to note that the detection techniques we explore can be, in turn, easily circumvented in almost all cases with simple updates to the obfuscator". So I was wondering whether current obfuscators have done this or not.