Ruhr-Uni-Bochum

Strong and Tight Security Guarantees Against Integral Distinguishers

2021

Konferenz / Journal

Research Hub

Research Hub A: Kryptographie der Zukunft

Research Challenges

RC 1: Cryptography against Mass Surveillance

Abstract

Integral attacks belong to the classical attack vectors against any given block ciphers. However, providing arguments that a given cipher is resistant against those attacks is notoriously difficult. In this paper, based solely on the assumption of independent round keys, we develop significantly stronger arguments than what was possible before: our main result is that we show how to argue that the sum of ciphertexts over any possible subset of plaintext is key-dependent, i.e., the non existence of integral distinguishers.

Tags

Symmetric Cryptography
Cryptography
Cryptanalysis