公开(公告)号：JP2000138668A

公开(公告)日：2000-05-16

申请号：JP28864699

申请日：1999-10-08

Applicant: ST MICROELECTRONICS SRL

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

IPC: H04L9/26 ,  H04L9/00 ,  H04L12/22 ,  H04L12/56

Abstract: PROBLEM TO BE SOLVED: To enhance a security level in an encipherment system based on a digital chaos model. SOLUTION: The processing is started from a couple of password codes or user keys, a discrete chaos model or map having a couple of the password codes or user keys is generated, a couple of the updated password codes or keys are dynamically generated for each processing step of a certain number in the chaos map, data to be transmitted in a transmission station are masked through logical combination with the dynamically updated keys at present, and a reception station eliminates the mask from the data by separating logically the digital data from the dynamically updated keys at present to restore the digital data in a clear state.

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.