Binary Huff Curves
J. Devigne and M. Joye

This paper describes the addition law for a new form for elliptic curves over fields of characteristic 2. Specifically, it presents explicit formulæ for adding two different points and for doubling points. The case of differential point addition (that is, point addition with a known difference) is also addressed. Finally, this paper presents unified point addition formulæ; i.e., point addition formulæ that can be used for doublings. Applications to cryptographic implementations are discussed.