42 citations · 114 across the 25 of their papers we have counts for
6 papers · 1 filter
A Non-commutative Cryptosystem Based on Quaternion Algebras
Khadijeh Bagheri, Mohammad-Reza Sadeghi, Daniel Panario
We propose BQTRU, a non-commutative NTRU-like cryptosystem over quaternion algebras. This cryptosystem uses bivariate polynomials as the underling ring. The multiplication operatio…
Lower bounds on the lifting degree of single-edge and multiple-edge QC-LDPC codes by difference matrices
Farzane Amirzade, Mohammad-Reza Sadeghi
In this paper, we define two matrices named as "difference matrices", denoted by and which significantly contribute to achieve regular single-edge QC-LDPC codes with the s…
Analytical lower bounds for the size of elementary trapping sets of variable-regular LDPC codes with any girth and irregular ones with girth 8
Farzane Amirzade, Mohammad-Reza Sadeghi
In this paper we give lower bounds on the size of elementary trapping sets (ETSs) belonging to variable-regular LDPC codes with any girth, , and irregular ones with girt…
Combining and Steganography of 3D Face Textures
Mohsen Moradi, Mohammad-Reza Sadeghi
One of the serious issues in communication between people is hiding information from others, and the best way for this, is deceiving them. Since nowadays face images are mostly use…
Algorithmic complexity of proper labeling problems
Ali Dehghan, Mohammad-Reza Sadeghi, Arash Ahadi
A proper labeling of a graph is an assignment of integers to some elements of a graph, which may be the vertices, the edges, or both of them, such that we obtain a proper vertex co…
On Advisability of Designing Short Length QC-LDPC Codes Using Perfect Difference Families
A. Tasdighi, M. R. Sadeghi
A simple and general definition of quasi cyclic low density parity check (QC LDPC) codes which are constructed based on circulant permutation matrices (CPM) is proposed. As an spec…