Wireless Communications under Hostile Jamming: Security and Efficiency by Tongtong Li & Tianlong Song & Yuan Liang

Author:Tongtong Li & Tianlong Song & Yuan Liang
Language: eng
Format: epub
ISBN: 9789811308215
Publisher: Springer Singapore

4.2 Secure Subcarrier Assignment

In this section, we present the secure subcarrier assignment scheme, for which the major component is an AES-based secure permutation algorithm . AES is chosen because of its simplicity of design, variable block and key sizes, feasibility in both hardware and software, and resistance against all known attacks [16]. Note that, the secure subcarrier assignment is not limited to any particular cryptographic algorithm but is highly recommended that only thoroughly analyzed cryptographic algorithms be applied.

The AES-based permutation algorithm is used to securely select the frequency hopping pattern for each user so that (i) different users always transmit on non-overlapping sets of subcarriers and (ii) malicious users cannot determine the frequency hopping pattern and therefore cannot launch follower jamming attacks.

We assume there are a total of N c available subcarriers and there are M users in the system. For i = 0, 1, ⋯ , M − 1, the number of subcarriers assigned to user i is denoted as . We assume that different users transmit over non-overlapping set of subcarriers, and we have . The secure subcarrier assignment algorithm is described in the following subsections.

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