Reliable and Secure Short-Packet Communications in Untrusted Diamond Relay Networks

This paper investigates short-packet communications over a diamond relay network with two untrusted relays (potential eavesdroppers) with the purpose of guaranteeing reliability and security simultaneously. As the performance metric, reliable-and-secure probability (RSP), considering both reliabilit...

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Bibliographic Details
Published in:IEEE access 2023, Vol.11, p.24686-24695
Main Author: Qian, Shen
Format: Article
Language:English
Subjects:
Decoding
diamond network
Diamonds
Eavesdropping
Internet of Things
Jamming
Network systems
Packet transmission
Physical layer security
Relay networks
Relays
Reliability
Reliability analysis
reliable-and-secure probability
Secrecy aspects
Security
short package
Trusted computing
untrusted relay
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Summary:This paper investigates short-packet communications over a diamond relay network with two untrusted relays (potential eavesdroppers) with the purpose of guaranteeing reliability and security simultaneously. As the performance metric, reliable-and-secure probability (RSP), considering both reliability and secrecy, is defined from the perspective of physical layer security. An analytical approach is proposed to investigate reliability and security by taking into account the characteristics of the short-packet transmission. RSPs are numerically obtained via the analytical framework by utilizing the source-channel separation theorem for the source-to-relay transmission and chief executive officer (CEO) problem analyses for the relay-to-destination transmission. It is found that the optimal RSP is achieved when the contributions from the source-relay transmission and the relay-destination transmission are balanced, even without support from a friendly jamming signal or artificial noise.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2023.3255881