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Title: Improving secure communication and image encryption through fixed-time AGHPS under external disturbances (English)
Author: Ouahabi, Rabiaa
Author: Soula, Yamina
Language: English
Journal: Applications of Mathematics
ISSN: 0862-7940 (print)
ISSN: 1572-9109 (online)
Volume: 71
Issue: 5
Year: 2026
Pages: 779-802
Summary lang: English
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Category: math
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Summary: This article suggests a secure communication scheme with a new synchronization technique combining Adaptive Generalized Hybrid Projective Synchronization (AGHPS) and fixed-time stability for chaotic systems. The scheme is based on the structural flexibility of AGHPS but offers guaranteed and fast convergence under fixed-time control regardless of initial conditions. A comparative analysis with a recently published method is performed. The comparison shows a significant improvement in the synchronization time, indicating faster convergence under the same circumstances. In addition, higher performance is achieved by the new method in secure communication applications, especially encrypted image transmission and recovery. Simulations show unambiguous improvement in image recovery quality even under channel interference and parameter uncertainties, i.e., the scheme's efficiency and reliability. This contribution therefore provides a computationally effective and secure synchronization framework with significant advantages over existing approaches and therefore a fine choice for real-time chaos-based communication systems. (English)
Keyword: secure communication
Keyword: image encryption
Keyword: Lyapunov stability
Keyword: chaotic system
MSC: 37C75
MSC: 93C10
MSC: 93D21
MSC: 94A60
DOI: 10.21136/AM.2026.0290-25
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Date available: 2026-10-12T13:01:19Z
Last updated: 2026-10-19
Stable URL: http://hdl.handle.net/10338.dmlcz/153802
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