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Ultrafast physical random bit generators based on broadband optical signals have been presented lately at astounding speeds. Some of the most popular mechanisms to obtain such random sequences are through signals that emerge from the coherence collapse operation of semiconductor lasers or from the photodetection signal beating of amplified spontaneous emission optical noise. Especially in the first...
In recent past, Volos et al proposed an image encryption scheme based on true random bits generator in [Signal Processing 93, 1328–1340, 2013]. The TRBG uses two mutually coupled double scroll chaotic systems that are synchronized via complete chaotic synchronization and inverse π-lag synchronization techniques. The numerical simulations demonstrated the effectiveness of chaotic true random bits generator...
This paper introduces a 4-dimensional chaotic map, consisting of sine, and cosine functions. Using this map and a generalized synchronization (GCS) theorem designs an 8-dimensional GCS system. The GCS system is used to design a chaotic pseudorandom number generator (CPRNG). Using the FIPS 140-2 test suit/generalized FIPS 140-2 test suit tests the randomness of three 1000-key streams consisting of...
This paper deals with chaotic cryptosystem and observer-based chaotic synchronization of Lozi chaotic generator for secure information transmission. Increasing the size of the secret key has been achieved thanks to the G-interval parameter method for observability analysis of a Lozi chaotic generator.
Based on a generalized synchronization (GS) theorem of non-autonomous discrete chaotic systems, this paper introduces a 6-dimensional non-autonomous discrete chaotic GS system. Simulations show that the trajectories of the GS system have significant characteristics of chaotic attractor. Using the GS system designs a 216 number string chaotic pseudorandom number generator (CPRNG). SP-800 randomness...
This paper introduce a novel 3-dimensional discrete chaotic map. The calculated Lyapunov exponents of the map are 1.1638, 0.8946 and -0.2177. Numerical simulations show that the dynamic behaviors of the map have chaotic attractor characteristics. Based on the chaotic map and a chaos generalized synchronization (GS) theorem, a 6-dimensional chaotic GS system is constructed. Using the chaotic GS system...
In this paper, a novel 3-dimensional discrete chaotic system is introduced. The calculated Lyapunov exponents of the system are 1.0287, 0.024615 and −0.58505. Numerical simulations show that the dynamic behaviors of the chaotic system have chaotic attractor characteristics. Based on the chaotic system and a chaos generalized synchronization (GS) theorem, a 6-dimensional chaotic generalized synchronic...
Based on a stream encryption scheme with avalanche effect, this paper introduces a block encryption scheme with avalanche effect (BESAE), gives the definition of ideal block pseudo random number generators (BPRNG). Using any key stream generated by an ideal 2d word BPRNG with different seed to decrypt the ciphertext encrypted via the ideal BPRNG and the BESAE will generate an avalanche-liked text...
In this paper, a novel 3-dimensional discrete chaotic map is introduced. The calculated Lyapunov exponents of the map are 0.0705, 0.0150 and -0.0743. Numerical simulations show that the dynamic behaviors of the chaotic map have chaotic attractor characteristics. Based on the chaotic map and a chaos generalized synchronization (GS) theorem, a 6-dimensional chaotic GS system is constructed. Using the...
In this paper, we propose a secure communication system composed of four chaotic oscillators. Two of those oscillators are unidirectionally coupled and employed as transmitter and receiver. The other two oscillators are indirectly coupled and are employed as keystream generators. The novelty lies in the generation of the same chaotic key both in the transmitter and receiver side for encryption and...
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