1. The second-order zero differential uniformity of the swapped inverse functions over finite fields
- Author
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Jeong, Jaeseong, Koo, Namhun, and Kwon, Soonhak
- Subjects
Computer Science - Information Theory ,Computer Science - Cryptography and Security - Abstract
The Feistel Boomerang Connectivity Table (FBCT) was proposed as the feistel counterpart of the Boomerang Connectivity Table. The entries of the FBCT are actually related to the second-order zero differential spectrum. Recently, several results on the second-order zero differential uniformity of some functions were introduced. However, almost all of them were focused on power functions, and there are only few results on non-power functions. In this paper, we investigate the second-order zero differential uniformity of the swapped inverse functions, which are functions obtained from swapping two points in the inverse function. We also present the second-order zero differential spectrum of the swapped inverse functions for certain cases. In particular, this paper is the first result to characterize classes of non-power functions with the second-order zero differential uniformity equal to 4, in even characteristic.
- Published
- 2024