Cryptanalysis of dynamic look-up table based chaotic cryptosystems

Cryptanalysis of Dynamic Look-up Table Based Chaotic Cryptosystems

In recent years many chaotic cryptosystems based on Baptista’s seminal work have been proposed. We analyze the security of two of the newest and most interesting ones, which use a dynamically updated look-up table and also work as stream ciphers. We provide different attack techniques to recover the keystream used by the algorithms. The knowledge of this keystream provides the attacker with the...

Look up Table Based Low Power Analog Circuit Testing

In this paper, a method of low power analog testing is proposed. In spite of having Oscillation Based Built in Self-Test methodology (OBIST), a look up table based (LUT) low power testing approach has been proposed to find out the faulty circuit and also to sort out the particular fault location in the circuit. In this paper an operational amplifier, which is the basic building block in the ana...

A More Secure Chaotic Cryptographic Scheme based on The Dynamic Look - up Table 1

We have proposed a chaotic cryptographic scheme based on iterating the logistic map and updating the look-up table dynamically. However, it has been broken recently. In this paper, the weaknesses of the original dynamic look-up table scheme are analyzed and a more secure chaotic encryption scheme based on this dynamic look-up table concept is proposed. Theoretical analysis indicates that the mo...

Look-Up Table Based Large Finite Field Multiplication in Memory Constrained Cryptosystems

Application of Gray code to the cryptanalysis of chaotic cryptosystems

Gray codes have found many applications in engineering and mathematics. In this work we explain how to apply Gray codes to the determination of the control parameter and initial point of a chaotic orbit generated by the Mandelbrot map when the kneading sequence is known. Possible applications to the cryptanalysis of a certain type of cryptosystems based on Baptista’s algorithm are also discussed.