This paper presents a new image encryption scheme based on the fractional-order Lorenz system which gives more degrees of freedom in key generation. In the modified fractional-order system, the key length is doubled using the three fractional-orde r parameters beside the three initial conditions, which makes it invulnerable to brute-force attacks. In addition, using a very simple algorithm, based on pixel confusion only, strongly encrypted images are produced. Such an algorithm can be used in real time applications. To evaluate the algorithm and analyze the encryption results, a standard image is used. A comparison of the colored correlation coefficients (horizontal, vertical, diagonal) for different cases with respect to a fractional-order parameter and another system parameter are introduced. Moreover, the encrypted image shows high sensitivity to the fractional-order key, which appears from the wrong decryption with 0.1% change of the fractional-order parameter. © 2012 IEEE.
Impedance matching through a single passive fractional element
For the first time, a generalized admittance Smith chart theory is introduced to represent fractional order circuit elements. The principles of fractional order matching circuits are described. We show that for fractional order ? < 1, a single parallel fractional element can match a wider range of load impedances as compared to its series counterpart. Several matching examples demonstrate the versatility of fractional order series and parallel element matching as compared to the conventional approach. © 2012 IEEE.
Analog fault diagnosis and testing by inverse problem technique
A novel algorithm for detecting soft faults in linear analog circuits based on the inverse problem concept is proposed
Fully digital 1-D, 2-D and 3-D multiscroll chaos as hardware pseudo random number generators
This paper introduces the fully digital implementation of a 1-D multiscroll chaos generator based on a staircase nonlinearity in the 3rd-order jerk system using the Euler approximation
Transient-time fractional-space trigonometry and application
In this work, we recall the generalized exponential function in the fractional-order domain which enables defining generalized cosine and sine functions
A low start-up voltage charge pump for energy harvesting applications
Threshold voltage cancellation (Vt cancellation) scheme is applied to cancel the threshold drop associated with the diode-connected device and improve charge pump performance
Rectangular waveguides in the fractional-order domain
This work introduces Maxwell’s equations in their time domain fractional derivatives form
Effect of boundary on controlled memristor-based oscillator
Recently, the applications of memristors have spread into many fields and especially in the circuit theory
Memristor-based relaxation oscillators using digital gates
This paper presents two memristor-based relaxation oscillators
Memristor-based oscillator using Deboo integrator
This paper introduces the modified single input Op-Amps memristor based oscillator