Degraded Discrete Memoryless Wiretap Channel with Ran dom States In this subsection, we define a (physically) degraded3 discrete memoryless state-dependent wiretap channel (DM-SWC) with random states, which are non-causally known at the transmitter. The secrecy problem over this channel is reviewed in this subsection according to publications [61, 62]. The model is illustrated in Figure 2.3 and it is defined as follows. 3In this subsection, the wiretap channel is physically degraded in Bob’s favor; however, the results are valid for a stochastically degraded channel as well. Qn i=1 PS(si) s Xxxxx’s Encoder W(x|M, s) Bob’s Decoder Degraded DM-SWC Qn PY |XS(yi|xi, si)PZ|Y (zi|yi) i=1 z y Mˆ M x = Ð(y) Xxx’s Receiver Figure 2.3: A degraded DM-SWC with non-causal CSI at the transmitter.
Degraded Discrete Memoryless Wiretap Channel with Ran dom States In this subsection, we define a (physically) degraded3 discrete memoryless state-dependent wiretap channel (DM-SWC) with random states, which are non-causally known at the transmitter. The secrecy problem over this channel is reviewed in this subsection according to publications [61, 62]. The model is illustrated in Figure 2.3 and it is defined as follows. 3In this subsection, the wiretap channel is physically degraded in Bob’s favor; however, the results are valid for a stochastically degraded channel as well. Qn
