[Resource Topic] 2016/155: Cryptanalysis of Multi-Prime $\Phi$-Hiding Assumption

Welcome to the resource topic for 2016/155

Title:
Cryptanalysis of Multi-Prime \Phi-Hiding Assumption

Authors: Jun Xu, Lei Hu, Santanu Sarkar, Xiaona Zhang, Zhangjie Huang, Liqiang Peng

Abstract:

In Crypto 2010, Kiltz, O’Neill and Smith used m-prime RSA modulus N with m\geq 3 for constructing lossy RSA. The security of the proposal is based on the Multi-Prime \Phi-Hiding Assumption. In this paper, we propose a heuristic algorithm based on the Herrmann-May lattice method (Asiacrypt 2008) to solve the Multi-Prime \Phi-Hiding Problem when prime e>N^{\frac{2}{3m}}. Further, by combining with mixed lattice techniques, we give an improved heuristic algorithm to solve this problem when prime e>N^{\frac{2}{3m}-\frac{1}{4m^2}}. These two results are verified by our experiments. Our bounds are better than the existing works.

ePrint: https://eprint.iacr.org/2016/155

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