Optoelectronic Chaotic Communications Systems

这项研究的目标是证明混沌通信系统是安全的，并能够以每秒10千兆位的速度进行高数据速率通信。该方法是使用具有光电时间延迟的半导体激光器来提供混沌发射器和接收器，当耦合时表现出同步的混沌动力学。通过在发射器的输出中隐藏消息，可以在接收器安全地传输和解密该消息。这项工作寻求多路传输几条信息，以获得高数据速率。研究了内部参数和操作参数来隐藏加密密钥，以确保高安全性。该方案的智能优点是找到了优化利用光带宽的方法，承认混沌载波的带宽超过了任何单个消息的带宽。通过在单个混沌载波内多路传输多个消息，可以获得与部署的光通信系统兼容的带宽。初步工作表明，选择合理的参数，混沌时滞系统可以掩盖加密密钥，具有较高的安全性。其中一个目标是看看这是否适用于更复杂的实际应用系统。这项工作的更广泛影响包括以与现有通信基础设施和新系统兼容的方式提高光通信的安全性。混沌加密是物理层安全的一种形式；唯一很少使用的层。因此，混沌加密可以与软件加密相结合。本研究为多学科培训提供了一种机制。这项工作涉及亚特兰大的佐治亚理工学院和法国梅茨的梅茨和苏佩莱克之间的国际合作。

The objective of this research is to demonstrate chaotic communications systems that are secure and enable high data-rate communications at 10 gigabits per second. The approach is to use semiconductor lasers with optoelectronic time delays to provide chaotic emitters and receivers that when coupled exhibit synchronized chaotic dynamics. By concealing a message in the output of the emitter, it can be transmitted securely and decrypted at the receiver. The work seeks to multiplex several messages for high data rates. Internal and operation parameters are explored to conceal the encryption key to ensure high security.The intellectual merit of this project is to find ways to optimally utilize the optical bandwidth acknowledging that the chaotic carrier's bandwidth exceeds that of any individual message. By multiplexing several messages within a single chaotic carrier, one can achieve bandwidths compatible with deployed optical communications systems. Preliminary work shows that choosing judicious parameters, chaotic time-delay systems can mask the encryption key, offering high security. One aim is to see if this holds for more complex systems for practical applications.The broader impacts of this work include increasing security in optical communications in a manner that is compatible with existing communications infrastructure and new systems. Chaos encryption is a form of physical layer security; the only layer rarely used. Chaos encryption can, thus, be combined with software encryption. The research provides a mechanism for multidisciplinary training. The work involves an international collaboration between Georgia Tech in Atlanta and in Metz and Supélec in Metz, France.