2 papers
cs.CR2026
Indistinguishability Lifting for Keyed Oracles, Compressed Ideal Cipher, and More Applications
Ritam Bhaumik, Yu-Hsuan Huang
Cryptographic security proofs often involve an adversary interacting with a larger, keyed oracle that consists of (potentially exponentially) many independent instances of a smalle…
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…