Quadratic APN Extensions

This dataset contains the look-up tables of the new quadratic APN functions in dimension eight (up to EA-equivalence) found by extending a quadratic APN function in dimension seven. A preprint of our paper is available at arxiv: C. Beierle, G. Leander, and L. Perrin. Trims and Extensions of Quadratic APN Functions. 2021. The file apn_8bit.txt contains the look-up tables of the 5,167 new quadratic APN functions found by this approach. Together with the 23 APN functions listed in [EP09], the 8,157 APN functions constructed by the QAM method [YWL14], the 10 APN functions presented in [WTG13], the two APN functions from the Taniguchi family [Tan19], the 12,921 APN functions from [BL21], and the 5,412 APN functions presented in [YP21], those are all 8-bit APN functions up to CCZ-equivalence known until August 2021 (31,692 in total).