LAUSR

Secrecy in the context of molecular communication is a relatively unexplored area. The presence of an eavesdropping (Eve) unit in a molecular communication channel can pose a significant threat to the integrity of the information being transmitted from the legitimate transmitter (Alice) to the legitimate receiver (Bob). The presence of both Bob and Eve simultaneously in a multiparticle diffusion-based molecular timing (DB-MT) channel leads to a mutual influence between them. This mutual influence can play a significant role in analyzing the secrecy performance of DB-MT channels. Motivated by this, in this letter, we analyze the mutual influence between Bob and Eve in terms of the correlation ( $\rho $ ) between their respective distances from Alice and its impact on the secrecy performance of the system. Specifically, we calculate the closed-form expression of the secrecy outage probability (SOP) metric by considering the impact of $\rho $ on the SOP of the system. Numerical results corroborate the derived analytical findings.