THE DYNAMIC CIPHERS – NEW CONCEPT OF LONG-TERM
                  CONTENT PROTECTING

                                  Grzegorz Szewczyk, PhD
                    Central Ostrobothnia University of Applied Sciences
                                 grzegorz.szewczyk@cou.fi


ABSTRACT: In the paper the original concept of a new cipher, targeted at this moment for
civil applications in technology (e.g. measurement and control systems) and business (e.g.
content protecting, knowledge-based companies or long-term archiving systems) is presented.
The idea of the cipher is based on one-time pads and linear feedback shift registers. The
rapidly changing hardware and software environment of cryptographic systems has been
taken into account during the construction of the cipher. The main idea of this work is to
create a cryptosystem that can protect content or data for a long time, even more than one
hundred years. The proposed algorithm can also simulate a stream cipher which makes it
possible to apply it in digital signal processing systems such as those within audio and video
delivery or telecommunication.

Keywords: Content protection, Cryptosystem, Dynamic cryptography, Linear Feedback Shift
Registers, Object-oriented programming, One-time pad, Random key, random number generators,
Statistical evaluation of ciphers.

JEL Codes: D83.