New paper in a series of how to solve Elliptic Curve Discrete Log Problem (ECDLP) in characteristic 2 with sub-exponential complexity. More results on this topic are expected.

Remark: it seems to me that the main assumption about degree falls and solvability which is at the heart of this paper, is simply entirely wrong.

Recent developments:
See this paper (negative result) and this survey paper (a bit more optimistic).