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SIAMCOMP
2010
100views more  SIAMCOMP 2010»
13 years 9 months ago
Algorithmic Enumeration of Ideal Classes for Quaternion Orders
We provide algorithms to count and enumerate representatives of the (right) ideal classes of an Eichler order in a quaternion algebra defined over a number field. We analyze the ...
Markus Kirschmer, John Voight
MOC
2000
102views more  MOC 2000»
13 years 10 months ago
Class group frequencies of real quadratic function fields: The degree 4 case
Abstract. The distribution of ideal class groups of Fq(T, M(T)) is examined for degree-four monic polynomials M Fq[T] when Fq is a finite field of characteristic greater than 3 wi...
Christian Friesen
EUROCRYPT
2000
Springer
14 years 2 months ago
A NICE Cryptanalysis
We present a chosen-ciphertext attack against both NICE cryptosystems. These two cryptosystems are based on computations in the class group of non-maximal imaginary orders. More pr...
Éliane Jaulmes, Antoine Joux
EUROCRYPT
1998
Springer
14 years 3 months ago
A Cryptosystem Based on Non-maximal Imaginary Quadratic Orders with Fast Decryption
We introduce a new cryptosystem with trapdoor decryption based on the di culty of computing discrete logarithms in the class group of the non-maximal imaginary quadratic order O q ...
Detlef Hühnlein, Michael J. Jacobson Jr., Sac...
ANTS
1998
Springer
96views Algorithms» more  ANTS 1998»
14 years 3 months ago
Experimental Results on Class Groups of Real Quadratic Fields
d Abstract) Michael J. Jacobson, Jr. Technische Universit
Michael J. Jacobson Jr.
ANTS
2004
Springer
111views Algorithms» more  ANTS 2004»
14 years 4 months ago
A Method to Solve Cyclotomic Norm Equations
We present a technique to recover f ∈ Q(ζp) where ζp is a primitive pth root of unity for a prime p, given its norm g = f ∗ ¯f in the totally real field Q(ζp + ζ−1 p )....
Nick Howgrave-Graham, Michael Szydlo
STOC
2005
ACM
138views Algorithms» more  STOC 2005»
14 years 11 months ago
Fast quantum algorithms for computing the unit group and class group of a number field
Computing the unit group and class group of a number field are two of the main tasks in computational algebraic number theory. Factoring integers reduces to solving Pell's eq...
Sean Hallgren