公开(公告)号：JPH11163740A

公开(公告)日：1999-06-18

申请号：JP24923098

申请日：1998-09-03

Applicant: ST MICROELECTRONICS SRL

Inventor： MAZZAGLIA SERGIO ,  ITALIA FRANCESCO ,  LAVORGNA MARIO

IPC: G06F11/10 ,  H03M13/00 ,  H04L1/00 ,  H04L12/56 ,  H04Q3/00 ,  H04Q11/04 ,  H04L12/28

Abstract: PROBLEM TO BE SOLVED: To provide a device that is integratable simply, with a hardware suitable for multimedia applications and realizes priority encoding transmission PET. SOLUTION: This PET decoder for an ATM communication network has a modular structure, consisting of a processing unit(PU) that is made up of a memory means comprising a ROM and a SRAM and a processing pipeline section (build_A, LU_dec, find_Y, find_X) that generates a square matrix A, based on a vector D at a relating point in a Galois field (GF [p]) from m-data blocks in a prescribed bit number and applies factorization to the elements of the matrix A by trigonometric factorization, and solves the sub components of an arithmetic formula through simple substitution. The PET decoder also has a control unit(CU) that interfaces the ATM communication network with a programmable parallel processor.

公开(公告)号：DE69828401D1

公开(公告)日：2005-02-03

申请号：DE69828401

申请日：1998-10-12

Applicant: ST MICROELECTRONICS SRL

Inventor： ITALIA FRANCESCO ,  FORTUNA LUIGI ,  BERITELLI FRANCESCO ,  DI COLA EUSEBIO

IPC: H04L9/26 ,  H04L9/00 ,  H04L12/22

Abstract: A cryptation system for information transmitted through packet switching networks including masking the digital information data by combining them at the transmitting station with digital data of a certain code of cryptation before transmitting the so encrypted data through the network and performing an inverse decrypting processing at the receiving station using the same code of encrypting, comprises generating at a transmitting station and at a receiving station, starting from a given pair of password codes or user key, a certain discrete chaotic model or map of said pair of codes or key, producing dynamically updated pairs of values of codes or keys every certain number of processing steps of said chaotic map, masking the data to be transmitted by way of a logic combination with said current dynamically updated keys at the transmitting station, demasking the data at the receiving station by way of a logic decomposition of said digital data from said current dynamically updated key returning the digital data to a clear condition.