Chaotic cryptography with modified inclusion method and indirect coupled chaotic synchronisation

Canyelles-Pericas, Pep, Kharel, Rupak, Busawon, Krishna and Postlethwaite, Ian (2014) Chaotic cryptography with modified inclusion method and indirect coupled chaotic synchronisation. In: 9th International Symposium on Communication Systems, Networks and Digital Sign (CSNDSP 2014), 23rd - 25th July 2014, Manchester, UK.

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Abstract

This work proposes a chaotic cryptographic system based on a modified inclusion method in combination with indirect coupled synchronisation to create a chaotic private key. A Rossler type chaotic oscillator is used to embed an encrypted message in its dynamics as well as to drive the piece-wise linear function of a Chua type system, used to create a chaotic key to encrypt the embedded message. In the receiver side a Rossler high gain observer is used to synchronise with the transmitter as well as to drive a second Chua oscillator to decrypt the message. A bidirectional link is applied to remove the nonlinear term in transmitter-receiver error dynamics analysis. Information retrieval is achieved when encrypted message amplification factors and gain matrix values are correctly tuned; leading to a transfer function between error dynamics and encrypted message equal to unity. In this way encrypted message is retrieved with straight forward error dynamics subtraction, avoiding left invertibility problem. Message is finally obtained with key chaotic decryption from a second receiver-driven Chua oscillator. All results presented are based on software simulation in an ideal communication channel.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Chaos Cryptography; Chua; High Gain Observer; Indirect Coupled Synchronisation; Modified Inclusion Method; Rossler
Subjects:	H600 Electronic and Electrical Engineering
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Paul Burns
Date Deposited:	04 Dec 2014 14:56
Last Modified:	12 Oct 2019 19:20
URI:	http://nrl.northumbria.ac.uk/id/eprint/18395

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