Search for one-round differential characteristics of lighweight block cipher Cypress-256
Mariia Rodinko, Roman Oliynykov, Roman Eliseev · 2018 IEEE 9th International Conference on Dependable Systems, Services and Technologies (DESSERT) · 2018
This paper presents three approaches to search for one-round differential characteristics with high probability for post quantum lightweight block cipher Cypress-256. The presented methods include the selection of appropriate input differences to the round function based on the properties of modulo addition operation. The proposed optimized method allowed to find differential characteristics for the round function of Cypress-256 with the probability 1/4.