https://doi.org/10.1140/epjst/e2014-02185-y
Regular Article
A fast and light stream cipher for smartphones
1 Enigmedia Corp., Portuetxe 23B, 3-12, 20018 San Sebastian, Spain
2 Institute for Complex Systems and Mathematical Biology, SUPA, University of Aberdeen, UK
3 Physics and Applied Mathematics Dept. University of Navarra, Spain
a e-mail: gerard@enigmediacorp.com
Received: 4 April 2014
Revised: 4 April 2014
Published online: 13 May 2014
We present a stream cipher based on a chaotic dynamical system. Using a chaotic trajectory sampled under certain rules in order to avoid any attempt to reconstruct the original one, we create a binary pseudo-random keystream that can only be exactly reproduced by someone that has fully knowledge of the communication system parameters formed by a transmitter and a receiver, sharing the same initial conditions. The plaintext is XOR'ed with the keystream creating the ciphertext, the encrypted message. This keystream passes the NIST's randomness test and has been implemented in a videoconference App for smartphones, in order to show the fast and light nature of the proposed encryption system.
© EDP Sciences, Springer-Verlag, 2014
