| Invited Talk

Name of the Speaker: Parthajit Mohapatra, IIT Tirupati
Name of the Organizer: Prof. Srikrishna Bhashyam
Venue: ESB-244 (Seminar Hall)
Date/Time: 30th May 2024 ( Thursday), 11:00 AM
Title: Role of Shared Keys in Secure Communication for Interference-Limited Environments

Abstract :

The talk will focus on the role of shared keys in enabling secure communication for interference-limited scenarios. When a transmitter and receiver share a secret key, the transmitter can securely send the message to the corresponding receiver using the shared key. Still, it might harm other receivers who are unaware of this key in the multi-user setting. Thus, shared keys can create conflicting outcomes for different receivers, making it a complex and challenging problem on using the key as a part of channel encoding. To gain deeper insights into this issue, we explore secure communication for a 2-user Gaussian Z-interference channel (Z-IC) with keys of finite rate. The work derives novel achievable schemes where the shared key is judiciously used in the channel encoding. The work also introduces the concept of key rate splitting for interference-limited scenarios and illustrates the effectiveness of these schemes. Toward the end of the talk, connection between shared keys in multi-user scenarios and caching in wireless networks will be discussed. The talk will conclude by highlighting some of our other recent research activities for short packet communication in an interference-limited environment.