Romanian Journal of Information Science and Technology (ROMJIST)

An open – access publication

  |  HOME  |   GENERAL INFORMATION  |   ROMJIST ON-LINE  |  KEY INFORMATION FOR AUTHORS  |   COMMITTEES  |  

ROMJIST is a publication of Romanian Academy,
Section for Information Science and Technology

Editor – in – Chief:
Radu-Emil Precup

Honorary Co-Editors-in-Chief:
Horia-Nicolai Teodorescu
Gheorghe Stefan

Secretariate (office):
Adriana Apostol
Adress for correspondence: romjist@nano-link.net (after 1st of January, 2019)

Founding Editor-in-Chief
(until 10th of February, 2021):
Dan Dascalu

Editing of the printed version: Mihaela Marian (Publishing House of the Romanian Academy, Bucharest)

Technical editor
of the on-line version:
Lucian Milea (University POLITEHNICA of Bucharest)

Sponsor:
• National Institute for R & D
in Microtechnologies
(IMT Bucharest), www.imt.ro

ROMJIST Volume 21, No. 1, 2018, pp. 18-33
 

Octaviana Datcu, Radu Hobincu, Lucian Petrică
Dynamically changing the secret key of an FPGA chaos-based cipher

ABSTRACT: As a continuation of previous work, where a discrete-time Baptista-type chaos-based cipher was implemented in a Xilinx FPGA module, this paper proposes a more complex scheme involving hybrid dynamics. A continuous chaotic evolution is utilized to dynamically and randomly change the secret key of the discrete-time part. This work describes the design of a continuous-time chaotic transmitter meant to embed the secret key as well as a high order sliding mode differentiator also designed such that it is capable of estimating the dynamics of the transmitter, and Baptista's algorithm secret key, conceptualized as its unknown input.

KEYWORDS: Baptista type algorithms; chaos-based cryptography; high order sliding mode observers; estimation

Read full text (pdf)






  |  HOME  |   GENERAL INFORMATION  |   ROMJIST ON-LINE  |  KEY INFORMATION FOR AUTHORS  |   COMMITTEES  |