Optoelectronic Chaotic Communications Systems

这项研究的目的是证明混沌通信系统是安全的，并实现每秒10千兆比特的高数据速率通信。 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，其表现出同步的混沌动力学。 通过在发送器的输出中隐藏消息，可以安全地传输消息并在接收器处解密。 这项工作的目的是多路复用的高数据速率的几个消息。 该方案的主要思想是在混沌载波的带宽超过任何单个信息的情况下，找到最佳利用光带宽的方法。 通过在单个混沌载波内复用多个消息，可以实现与部署的光通信系统兼容的带宽。 初步工作表明，通过合理选择参数，混沌时滞系统可以掩盖加密密钥，具有较高的安全性。 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。 该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和梅斯的格鲁吉亚理工学院以及法国梅斯的Supélec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.