Cryptanalysis of Stream Cipher Cryptosystem Based on Soft Computing Techniques

Al-Ageelee, .DrSalim Ali Abbas; Jwad, RiyamNoori

doi:10.9790/0661-1901047884

IOSR JCE

2017

DOI: 10.9790/0661-1901047884

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Cryptanalysis of Stream Cipher Cryptosystem Based on Soft Computing Techniques

.DrSalim Ali Abbas Al-Ageelee¹,

RiyamNoori Jwad²

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Cited by 2 publications

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Linear Cryptanalysis of Substitution Ciphers Using Particle Swarm Optimization

Rajkumar

2017

Orient. J. Chem

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Cryptanalysis is a standout amongst the most vital requesting zones of capable research in the request of the security. An approach of data security is Cryptography. Cryptanalysis is the investigation to break cryptography without the encryption key. Cryptanalysis is breaking or separating cipher text content into its identical plain-content without past data of the secret key or without knowing the real approach to unscramble the cipher text content. Particle Swarm Optimization (PSO) is a population based, self-versatile find improvement of optimization performance motivated by group performance of bird flocking or fish schooling. In this paper discussed with use of PSO in automated cryptanalysis of simple substitution ciphers. In this manner, encrypted data can be sent by any individual utilizing the general public key, yet the data can be decoded just by the holder of the secret key.

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Linear Cryptanalysis of Substitution Ciphers Using Particle Swarm Optimization

Rajkumar

2017

Orient. J. Chem

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Using Evolving Algorithms to Cryptanalysis Nonlinear Cryptosystems

Jawad

Ali

2020

Baghdad Sci.J

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In this paper, new method have been investigated using evolving algorithms (EA's) to cryptanalysis one of the nonlinear stream cipher cryptosystems which depends on the Linear Feedback Shift Register (LFSR) unit by using cipher text-only attack. Genetic Algorithm (GA) and Ant Colony Optimization (ACO) which are used for attacking one of the nonlinear cryptosystems called "shrinking generator" using different lengths of cipher text and different lengths of combined LFSRs. GA and ACO proved their good performance in finding the initial values of the combined LFSRs. This work can be considered as a warning for a stream cipher designer to avoid the weak points, which may be found in the stream cipher, and may be explored by the cryptanalysts. This work can find the optimal solution for text with minimum lengths of 20 characters and 100 iteration were very enough to find the real initial values of key stream.

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Cryptanalysis of Stream Cipher Cryptosystem Based on Soft Computing Techniques

Cited by 2 publications

References 6 publications

Linear Cryptanalysis of Substitution Ciphers Using Particle Swarm Optimization

Linear Cryptanalysis of Substitution Ciphers Using Particle Swarm Optimization

Using Evolving Algorithms to Cryptanalysis Nonlinear Cryptosystems

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