(Enter summary)
Abstract: The difficulty of computing discrete logarithms known to
be "short" is examined, motivated by recent practical interest in using
Diffie-Hellman key agreement with short exponents (e.g. over Zp with
160-bit exponents and 1024-bit primes p). A new divide-and-conquer algorithm
for discrete logarithms is presented, combining Pollard's lambda
method with a partial Pohlig-Hellman decomposition. For random DiffieHellman
primes p, examination reveals this partial decomposition itself
allows... (Update)
Context of citations to this paper: More
...Z p , and elements g x 2 Z p and g y 2 Z p , find g xy 2 Z p . These two problems hold their properties in a prime order subgroup[30, 28]. We assume that all numerical operations of the protocol are on the cyclic group where it is hard to solve these problems. We consider the...
...the order of J K L . 3. 3 Attacks Based on Composite Order Subgroups The attacker can exploit subgroups that do not have large prime order [51]. This is best illustrated by an example. Suppose Alice and Bob choose a prime M U R , where q is prime, and a generator of order...
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BibTeX entry: (Update)
P. vanOorschot, M. Wiener, "On Diffie-Hellman Key Agreement with Short Exponents", Proceedings of Eurocrypt '96, Springer-Verlag LNCS, May 1996. http://citeseer.ist.psu.edu/article/vanoorschot96diffiehellman.html More
@article{ vanoorschot96diffiehellman,
author = "Paul C. van Oorschot and Michael J. Wiener",
title = "On {Diffie-Hellman} Key Agreement with Short Exponents",
journal = "Lecture Notes in Computer Science",
volume = "1070",
pages = "332--??",
year = "1996",
url = "citeseer.ist.psu.edu/article/vanoorschot96diffiehellman.html" }
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