Abstract: Community structure is believed to be one of the notable features of complex networks representing real complicated systems. Very often, uncovering community structures in networks can be regarded as an optimization problem, thus, many evolutionary algorithms based approaches have been put forward. . In this paper Central Force Optimization (CFO), physics based optimization, and its variants are used to detect communities. CFO is deterministic in nature, unlike the most widely used meta-heuristics. However, CFO is not free from the problem of premature convergence. Therefore the variants used Adaptive CFO (ACFO) and Multi-Start CFO (MCFO) are used in enhancing the convergence.

• Publication Date: 26-Feb-2017
• DOI: 10.15224/978-1-63248-117-7-51
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Abstract: Public key cryptography is extensively used for encryption, signing contracts and secure exchanges over the unreliable network. The findings of Shor in 1994, of a powerful algorithm which was based on quantum mechanics for computing discrete logarithms and factoring large integers sabotaged the security presumptions upon which the currently used public key cryptographic protocols are based, like ElGamal, RSA and ECC. However, few cryptosystems, known as post quantum cryptosystems, while not currently in wide use are considered to be resistant to such attacks. In this paper, a quantum version of ElGamal Cryptosystem is proposed whose security relies on the commutative rotation transformations and measurements in computational basis of qubits. An understanding of the new scheme over the quantum channels is provided. The proposed cryptosystem allows the party to send messages in the form of qubits over a quantum channel. Also the proposed protocol provides an opportunity for two parties t

• Publication Date: 26-Feb-2017
• DOI: 10.15224/978-1-63248-117-7-52
• Views: 0
• Downloads: 0