FPGA hardware acceleration of an improved chaos-based cryptosystem for real-time image encryption and decryption

Gafsi, Mohamed; Hajjaji, Mohamed Ali; Malek, Jihene; Mtibaa, Abdellatif

doi:10.1007/s12652-021-03555-5

Cited by 15 publications

(6 citation statements)

References 34 publications

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“…However, these PRNG are not strong against hackers. 17 Therefore, we propose a strong PRNG based on four different chaotic systems which are the Lorenz, Rossler, Chen, and Chua's systems. These systems were selected from a variety of chaotic systems for their high-dimensional characteristics and their high chaotic responses.…”

Section: Proposed Pseudo-random Number Generatormentioning

confidence: 99%

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Improved chaos‐RSA‐based hybrid cryptosystem for image encryption and authentication

Gafsi

Amdouni

Hajjaji

et al. 2022

Concurrency and Computation

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This article puts forward a fast chaos-RSA-based hybrid cryptosystem to secure and authenticate secret images. The SHA-512 is used to generate a 512-bit initial key.The RSA system is used to encrypt the initial secret key and signature generation for both the sender and image authentication. In fact, a powerful block-cipher algorithm is developed to encrypt and decrypt images with a high level of security. At this stage, a strong PRNG based on four chaotic systems is propounded to generate high-quality keys. Therefore, an improved architecture is suggested. It performs confusion and diffusion of images with low computational complexity. In the final step, the encrypted secret key, signature, and encrypted image are combined together in order to obtain an encrypted signed image. The block-cipher algorithm is evaluated in-depth for several ordinary and medical images with different types, content, and size. The obtained simulation results demonstrate that the system enables high-level security. The entropy has achieved a value of 7.9998 which is the most important feature of randomness. A comparative study against numerous recent encryption algorithms demonstrates that the proposed algorithm provides good results.

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Section: Proposed Pseudo-random Number Generatormentioning

confidence: 99%

“…In literature, most researchers used one or two chaotic systems for key generators designing. However, these PRNG are not strong against hackers 17 . Therefore, we propose a strong PRNG based on four different chaotic systems which are the Lorenz, Rossler, Chen, and Chua's systems.…”

Section: Proposed Cryptosystem Algorithmmentioning

confidence: 99%

Improved chaos‐RSA‐based hybrid cryptosystem for image encryption and authentication

Gafsi

Amdouni

Hajjaji

et al. 2022

Concurrency and Computation

Self Cite

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“…Hardware co-simulation is an intermediate step between the first digital simulation and the final practical implementation based on an experimental test bench, as demonstrated in Figures 24 and 25. 83 The first step consists in designing the control technique with Simulink and verifying it by digital simulation. In the second step, the control technique should be designed using the XSG toolbox and verified by simulation using the MATLAB environment and the Vivado tool.…”

Section: Hardware-in-the-loop Co-simulationmentioning

confidence: 99%

Section: Fpga Implementationmentioning

confidence: 99%

Design and Xilinx Virtex-field-programmable gate array for hardware in the loop of sensorless second-order sliding mode control and model reference adaptive system–sliding mode observer for direct torque control of induction motor drive

Krim

Mimouni

2022

Proceedings of the Institution of Mechanical Engineers, Part I:

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This article aims first to propose an improved space vector modulation–direct torque control in order to enhance the induction motor performance using: (1) a super-twisting controller and (2) a novel model reference adaptive system based on a sliding mode observer. Second, due to the complexity of the suggested control algorithm, this article deals also with a hardware implementation on a field-programmable gate array board. Indeed, the field-programmable gate array is mainly chosen to reduce the execution time, thanks to its parallel processing which significantly improves the quality of the control system by reducing the sampling period, and consequently the delays in the control loop. Besides, the super-twisting controller is proposed to enhance the speed regulation loop which is a second-order sliding mode control technique that uses a continuous control law to prevent the chattering phenomenon induced by the first-order sliding mode control technique. Moreover, the high performance control requires information about the rotor speed which can be obtained by a sensor. Generally, the use of the speed sensor increases the system cost and size, and reduces its system reliability. Therefore, a combination between a model reference adaptive system observer and a sliding mode observer is suggested for speed estimation and overcoming the sensitivity of the classical model reference adaptive system observer against uncertainties and stator resistance variations. The performance of the proposed space vector modulation--direct torque control--super-twisting controller with the model reference adaptive system--sliding mode observer algorithm of an induction motor is verified through simulation, hardware co-simulation and experimental validation utilizing a field-programmable gate array Virtex-5-ML507 board. The performance of the suggested sensorless control method is compared also with other recent published schemes.

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“…Finally, reduced cost implementing the chaos in hardware can reduce the cost of a system by eliminating the need for expensive components such as processors and memory chips. This is because chaotic systems require fewer components, which can lead to cost savings [ 30 , 31 ]. So, CS by chaos achieves a cryptosystem simultaneous to data compression.…”

Section: Introductionmentioning

confidence: 99%

New approach to improve power consumption associated with blockchain in WSNs

Jabor,

Azez,

Campelo

et al. 2023

PLoS ONE

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Nowadays, Wireless Sensor Networks (WSNs) are widely used for collecting, communicating, and sharing information in various applications. Due to its limited resources in terms of computation, power, battery lifetime, and memory storage for sensor nodes, it is difficult to add confidentiality and integrity security features. It is worth noting that blockchain (BC) technology is one of the most promising technologies, because it provides security, avoids centralization, and a trusted third party. However, to apply BCs in WSNs is not an easy task because BC is typically resource-hungry for energy, computation, and memory. In this paper, the additional complication of adding BC in WSNs is compensated by an energy minimization strategy, which basically depends on minimizing the processing load of generating the blockchain hash value, and encrypting and compressing the data that travel from the cluster-heads to the base station to reduce the overall traffic, leading to reduced energy per node. A specific (dedicated) circuit is designed to implement the compression technique, generate the blockchain hash values and data encryption. The compression algorithm is based on chaotic theory. A comparison of the power consumed by a WSN using a blockchain implementation with and without the dedicated circuit, illustrates that the hardware design contributes considerably to reduce the consumption of power. When simulating both approaches, the energy consumed when replacing functions by hardware decreases up to 63%.

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FPGA hardware acceleration of an improved chaos-based cryptosystem for real-time image encryption and decryption

Cited by 15 publications

References 34 publications

Improved chaos‐RSA‐based hybrid cryptosystem for image encryption and authentication

Improved chaos‐RSA‐based hybrid cryptosystem for image encryption and authentication

Design and Xilinx Virtex-field-programmable gate array for hardware in the loop of sensorless second-order sliding mode control and model reference adaptive system–sliding mode observer for direct torque control of induction motor drive

New approach to improve power consumption associated with blockchain in WSNs

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