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- Guangkui Xu, Xiwang Cao, Shanding Xu
- Cryptography and Communications
- 2015

The switching method is a very powerful method to construct new APN functions and differentially 4-uniform permutations over finite fields of even characteristic. In this paper, using this method, we present several new constructions of infinite classes of nonpower APN functions and two new classes of bent functions in finite fields of odd characteristic.

- Guangkui Xu, Xiwang Cao, Shanding Xu
- Applicable Algebra in Engineering, Communication…
- 2016

In this paper, several classes of Boolean functions with few Walsh transform values, including bent, semi-bent and five-valued functions, are obtained by adding the product of two or three linear functions to some known bent functions. Numerical results show that the proposed class contains cubic bent functions that are affinely inequivalent to all known… (More)

- Guangkui Xu, Xiwang Cao, Shanding Xu
- Cryptography and Communications
- 2016

In this paper, a secondary construction of p-ary bent functions is presented. Two classes of p-ary bent functions of algebraic degree p are constructed by modifying the values of some known bent functions on some set of F p 2 k $\mathbb {F}_{p^{2k}}$ . Furthermore, the resulted p-ary bent functions are employed to construct a class of linear codes with… (More)

- Guangkui Xu, Xiwang Cao, Shanding Xu
- Cryptography and Communications
- 2015

For any odd prime p≥5, some optimal p-ary cyclic codes with parameters [p m −1,p m −2m−2,4] are presented by using perfect nonlinear monomials and the inverse function over 𝔽 p m $\mathbb {F}_{p^{m}}$ . In addition, almost perfect nonlinear monomials, and other monomials over 𝔽 5 m $\mathbb {F}_{5^{m}}$ are used to construct optimal quinary cyclic codes… (More)

- Guangkui Xu, Xiwang Cao, Shanding Xu
- Int. J. Found. Comput. Sci.
- 2017

- Gaojun Luo, Xiwang Cao, Shanding Xu, Jiafu Mi
- Cryptography and Communications
- 2017

Linear codes with few weights have applications in secret sharing, authentication codes, association schemes, date storage systems, strongly regular graphs and some other fields. In this paper, we present several classes of binary linear codes with two or three weights and study their weight distributions. Two classes of strongly regular graphs are… (More)

- Guangkui Xu, Xiwang Cao, Shanding Xu
- Applicable Algebra in Engineering, Communication…
- 2015

In this paper, two infinite classes of quadratic differentially p-uniform binomials over $$\mathbb {F}_{p^n}$$ F p n (n is divisible by 4 or 3) are constructed from known perfect nonlinear binomials. In particular, for $$p=3$$ p = 3 , such functions are ternary differentially 3-uniform functions which are not CCZ-equivalent to known ones. In addition, two… (More)

- Shanding Xu, Xiwang Cao, Guangkui Xu
- IET Communications
- 2016

- Shanding Xu, Xiwang Cao, Guangkui Xu
- Int. J. Found. Comput. Sci.
- 2016

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