Security enhancement and bandwidth increase are requirements of ultrafast future optical code division networks that also minimise the latency at nodes without distressing the traffic performance. In OCDMA systems, eavesdropper tries to breach the optical code, and encoded/encrypted data in order to get correct code word of legitimate user. For security enhancement, an ultra high speed 4 \(\times\) 100 Gbps two dimensional Diagonal identity matrix (2D-DIM) code and four input single output (FISO) all optical logic gate with private key encryption is proposed and its performance in terms of security is analyzed. Expressions for synchronous and asynchronous transmissions are derived for proposed work and it is perceived that asynchronous transmission has better security. Further performance/security analysis is carried out for different scenarios such as with/without FISO, with 1D-DIM/2D-DIM codes, using 4 \(\times\) 1 AND gate/NOR gate in terms of correct code detection rate (CCDR), max. eye amplitude, Received Q factor, Signal to noise ratio at different launched power levels for legitimate user and eavesdropper. Eavesdropper attacked the proposed system but due to FISO layering, private key encryption, and 2D-DIM codes, cannot get acceptable level of CCDR. To the best of author’s knowledge, proposed system is ultra high speed with enhanced security and no reported studies have investigated security enhancement at this much ultra high speed.

安全性增强和带宽增加是超快未来光码分网络的要求，它们还可以在不影响流量性能的情况下最大限度地减少节点的延迟。在 OCDMA 系统中，窃听者试图破坏光代码和编码/加密数据，以获得合法用户的正确代码字。为增强安全性，超高速 4  \(\times\) 提出了100 Gbps二维对角单位矩阵(2D-DIM)码和四输入单输出(FISO)全光逻辑门与私钥加密，并分析了其在安全方面的性能。同步和异步传输的表达式是为建议的工作导出的，并且认为异步传输具有更好的安全性。对不同场景进行进一步的性能/安全分析，例如使用/不使用 FISO，使用 1D-DIM/2D-DIM 代码，使用 4  \(\times\) 1 与门/或非门在正确代码检测率 (CCDR) 方面，最大。合法用户和窃听者在不同发射功率电平下的眼图幅度、接收 Q 因子、信噪比。窃听者攻击了提议的系统，但由于 FISO 分层、私钥加密和 2D-​​DIM 代码，无法获得可接受的 CCDR 级别。据作者所知，所提出的系统是具有增强安全性的超高速系统，并且没有报告研究以如此高的速度研究安全性增强。