Integrated data-identity transmission scheme based on a chaotic-driven approach with custom labeling

This paper proposes a chaos-driven data-identity integrated transmission scheme to achieve highly secure optical communication resistant to physical-layer interception. By embedding hardware device information and key initial values from both the transmitter and receiver into unique identity labels, these labels are used to drive a chaotic model that generates chaotic sequences for encrypting data into ciphertext. The identity labels and ciphertext are then superimposed in the power domain, enabling integrated processing of user identity and transmitted signals in the digital domain. This approach significantly reduces the risk of unauthorized interception and decryption, thereby enhancing transmission security. The proposed scheme was experimentally validated in an intensity modulation/direct detection (IM/DD) system over a 2 km seven-core optical fiber, achieving an integrated transmission rate of 110.74 Gb/s. Experimental results demonstrate that legitimate users can recover the initial key values and reconstruct the data using the identity labels, whereas unauthorized receivers cannot extract the keys or decipher the encryption method. The bit error rate (BER) at the unauthorized receiver remains consistently around 0.5, effectively ensuring secure information transmission.