标题： 对多变量CCZ方案的密码分析 显示英文标题

标题： Cryptanalysis of a multivariate CCZ scheme

摘要： 我们考虑多变量方案Pesto，该方案由Calderini、Caminata和Villa提出。 在此方案中，公钥多项式是通过对一组二次秘密多项式应用CCZ变换得到的。 因此，公钥包含次数为4的多项式。 在本工作中，我们证明公共次数4的多项式系统可以有效地简化为二次多项式系统。 这似乎表明，CCZ变换可能并未显著提高安全性，这与最初的看法相反。 显示英文摘要

摘要： We consider the multivariate scheme Pesto, which was introduced by Calderini, Caminata, and Villa. In this scheme, the public polynomials are obtained by applying a CCZ transformation to a set of quadratic secret polynomials. As a consequence, the public key consists of polynomials of degree 4. In this work, we show that the public degree 4 polynomial system can be efficiently reduced to a system of quadratic polynomials. This seems to suggest that the CCZ transformation may not offer a significant increase in security, contrary to what was initially believed.