Mixing a Covert and a Non-Covert User
Information Theory
2023-05-12 v2 math.IT
Abstract
This paper establishes the fundamental limits of a two-user single-receiver system where communication from User 1 (but not from User 2) needs to be undetectable to an external warden. Our fundamental limits show a tradeoff between the highest rates (or square-root rates) that are simultaneously achievable for the two users. Moreover, coded time-sharing for both users is fundamentally required on most channels, which distinguishes this setup from the more classical setups with either only covert users or only non-covert users. Interestingly, the presence of a non-covert user can be beneficial for improving the covert capacity of the other user.
Cite
@article{arxiv.2305.06268,
title = {Mixing a Covert and a Non-Covert User},
author = {Abdelaziz Bounhar and Mireille Sarkiss and Michèle Wigger},
journal= {arXiv preprint arXiv:2305.06268},
year = {2023}
}
Comments
Accepted to 2023 IEEE International Symposium on Information Theory (ISIT)