Information encryption and decryption using hyperchaotic systems in delayed nonlinear feedback systems
Information encryption and decryption using hyperchaotic systems in delayed nonlinear feedback systems
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DOI：
10.1109/icumt.2010.5676533
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发表时间：
2010-12
期刊：
影响因子：
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通讯作者：
K. G. Gopchandran;K. Gopakumar;B. Premlet
中科院分区：
文献类型：
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作者：
K. G. Gopchandran;K. Gopakumar;B. Premlet
在通信系统中，利用混沌对信息信号进行加密和解密的可能性已经得到广泛的应用和接受。具有时滞的非线性反馈系统所产生的混沌具有高维的超混沌动力学特征。提出了一种利用时滞反馈非线性振子超混沌机制的快速加密解密方案。信息的传输是通过将一个小幅度的信息信号添加到一个大的混沌载波上，后者有效地隐藏了前者。在接收器处，通过从发送的混沌加消息信号中减去在接收器中产生的混沌来提取消息。该系统基于具有延迟非线性反馈的混沌装置，具有混沌同步的高鲁棒性，在稳定性和信息恢复方面具有很好的性能。
The possibility of using chaos for the encryption and decryption of message signals in communication systems has been widely used and accepted. Hyperchaotic dynamics of high dimensionality is featured in chaos generated by systems with delayed nonlinear feedback. An efficient and fast encryption and decryption scheme exploiting hyperchaotic regimes of a nonlinear oscillator with time delay feedback is proposed. Information is transmitted by adding a small amplitude message signal to a large chaotic carrier, the latter effectively hiding the former. The message is extracted at the receiver by subtracting the chaos created in the receiver from the transmitted chaos-plus-message signal. The cryptographic systems demonstrated here is based on chaotic devices with delayed nonlinear feedback, which features a high robustness of the chaos synchronization and a very good performance in terms of stability and information recovery.