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INDOCRYPT
2010
Springer

Partial Key Exposure Attack on RSA - Improvements for Limited Lattice Dimensions

11 years 3 months ago
Partial Key Exposure Attack on RSA - Improvements for Limited Lattice Dimensions
Abstract. Consider the RSA public key cryptosystem with the parameters N = pq, q < p < 2q, public encryption exponent e and private decryption exponent d. In this paper, cryptanalysis of RSA is studied given that some amount of the Most Significant Bits (MSBs) of d is exposed. In Eurocrypt 2005, a lattice based attack on this problem was proposed by Ernst, Jochemsz, May and de Weger. In this paper, we present a variant of their method which provides better experimental results depending on practical lattice parameters and the values of d. We also propose a sublattice structure that improves the experimental results significantly for smaller decryption exponents.
Santanu Sarkar, Sourav Sengupta, Subhamoy Maitra
Added 13 Feb 2011
Updated 13 Feb 2011
Type Journal
Year 2010
Where INDOCRYPT
Authors Santanu Sarkar, Sourav Sengupta, Subhamoy Maitra
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