Author

Ritam Bhaumik

2 papers indexed here

We haven’t gathered this author’s papers yet. Follow them and we’ll fetch their work.

Not the right person? Other researchers publish under this name.

Preprint Oct 2026

Indistinguishability Lifting for Keyed Oracles, Compressed Ideal Cipher, and More Applications

A generic indistinguishability lifting theorem is established: if the two base oracles are indistinguishable under quantum queries, then their corresponding keyed oracles are too, up to an O(q^2) multiplicative loss in distinguishing advantage, where q is the number of queries made by the adversary.

Ritam Bhaumik, Yu-Hsuan Huang · 0 citations

Preprint Sep 2026

Indistinguishability of Sum of Permutations: A Fourier Analytic Route to Classical and Quantum Security

A unified Fourier analytic treatment of Dinur's variable-output single-permutation construction, $\mathsf{LXoP}$, for every fixed output width, and derive its classical and quantum security bounds; for one- and two-block outputs, they give concrete quantum security bounds.

Ritam Bhaumik, Chun Guo, Xiao-Ning Guo et al. · 0 citations