2 papers
cs.CR2026
Indistinguishability of Sum of Permutations: A Fourier Analytic Route to Classical and Quantum Security
Ritam Bhaumik, Chun Guo, Xiaoning Guo +1
We study classical and quantum indistinguishability of sums of independent random permutations and related transformations from permutations to functions. Let be a finite abeli…
cs.CR2018
Understanding the Related-Key Security of Feistel Ciphers from a Provable Perspective
Chun Guo
We initiate the provable related-key security treatment for models of practical Feistel ciphers. In detail, we consider Feistel networks with four whitening keys ($i=0,1,2…