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• W2808282987 abstract "Physical layer (PHY) security has emerged as a promising methodology for securing current and future networks that employ orthogonal frequency-division multiplexing (OFDM) technology. OFDM is the basic building block for multicarrier modulation in most contemporary networks such as vehicular ad hoc networks, Internet of Things (IoT), as well as 4G/5G systems. Most existing OFDM-based security solutions lack the notion of secrecy and dynamicity when combining a secret key with random information extracted from the physical channel. Yet, some solutions perform encryption preinverse fast Fourier transform and some postinverse fast Fourier transform, without clear guidelines concerning the impact on performance and security. In this paper, OFDM-based encryption schemes at the PHY are investigated, analyzed, and weaknesses are identified. It is shown that encryption in the frequency domain slightly mitigates the effects of channel fading and improves the bit error-rate performance. On the other hand, time-domain encryption is shown to be more secure. Furthermore, a dynamic secret key approach that enhances the security level of OFDM-based encryption schemes, in addition to a new technique for updating cipher primitives for input OFDM symbols or frames, are proposed. These schemes are shown to strike a good balance between performance and security robustness as demonstrated through experimental simulations." @default.
• W2808282987 created "2018-06-21" @default.
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• W2808282987 date "2019-02-01" @default.
• W2808282987 modified "2023-10-01" @default.
• W2808282987 title "An Efficient OFDM-Based Encryption Scheme Using a Dynamic Key Approach" @default.
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• W2808282987 doi "https://doi.org/10.1109/jiot.2018.2846578" @default.
• W2808282987 hasPublicationYear "2019" @default.
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