Algebrai Properties of Cryptosystem PGM

Some Algebrai Properties of (Co)Spans?

One - Way Fun tions in Worst - Case Cryptography : Algebrai and Se urity Properties

Improving the Rao-Nam secret key cryptosystem using regular EDF-QC-LDPC codes

This paper proposes an efficient joint secret key encryption-channel coding cryptosystem, based on regular Extended Difference Family Quasi-Cyclic Low-Density Parity-Check codes. The key length of the proposed cryptosystem decreases up to 85 percent using a new efficient compression algorithm. Cryptanalytic methods show that the improved cryptosystem has a significant security advantage over Ra...

A Parallel Permutation Multiplier for a PGM Crypto-chip

A symmetric key cryptosysteni, called PGM, based on log~ r i t h r n i ~ signatures for finite pcrmutation groups was invented by S. Magliveras in the late 1970's. PGM is intended to be used in cryptosystems with high data rates. This requires exploitation of the potential parallelism in composition of permutations. As a first step towards a full VLSI implementation, a parallel multiplier has b...

Moving Algebrai Cy les of Bounded Degree

The Chow Moving Lemma is a theorem whi h asserts that a given algebrai sy le on a smooth algebrai variety X an be moved within its rational equivalen e lass to interse t properly a given ry le on X provided that r + s dim(X) ( f. [Chow℄, [S2℄). In the past few years, there has been onsiderable interest in studying spa es of algebrai y les rather than simply y les modulo an equivalen e relation....