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SIAMCOMP
2010
100views more  SIAMCOMP 2010»
13 years 10 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»
14 years 2 days 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 3 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 4 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 4 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 5 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»
15 years 18 days 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