Iraqi Journal for Computers and Informatics
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Using Genetic Algorithm to Break Knapsack Cipher with Sequence Size 16
Get PDFWith the growth of networked system and applications such as eCommerce, the demand for effective internetsecurity is increasing. Cryptology is the science and study of systems for secret communication. It consists of twocomplementary fields of study: cryptography and cryptanalysis.The genetic algorithm is one of the search methods, whichfinds the optimal solution. It is one of the methods, which is used to decrypt cipher.This work focuses on using GeneticAlgorithms to cryptanalyse knapsack cipher. The knapsack cipher is with a knapsack sequence of size 16 to encrypt twocharacters together. Different values of parameters have been used: Population size, mutation rate, number of generation
A Proposed Firewall for Viruses and Steganography Image
Get PDFThe open communication network, Internet, has problems surrounding the security of the Internet sites. Such as hacker intrusioncosting organizations a large amount of money and untold losses in productivity; hate groups using the Internet to distribute their maliciousworks to these sites, and many other types of attacks. A firewalls strategies protect Internet sites from intentional hostile intrusion that couldcompromise confidentiality or results in data corruption or denial of service
Gate Control System for New Iraqi License Plate
Get PDFThis paper presents an approach to license plate localization and recognition. A proposed method is designed to control the opening of door gate based on the recognition of the license plates number in Iraq. In general the system consists of four stages; Image capturing, License plate cropping, character segmentation and character recognition. In the first stage, the vehicle photo is taken fromstandard camera placed on the door gate with a specific distance from the front of vehicle to be processed by our system. Then, the detection method searches for the matching of the license plate in the image with a standard plate. The segmentation stage is performed by is using edge detection. Then character recognition, done by comparing with template standard numbers and letters used in the Iraqi plate. The system was implemented using Matlab (R2012a) and shows accurate performance results reached 93.33%
RSA Cryptographic Key Generation Using Fingerprint Minutiae
Get PDFHuman users find difficult to remember long cryptographic keys. Therefore, researchers, for a long time period, have beeninvestigating ways to use biometric features of the user rather than memorable password or passphrase, in an attempt to produce tough andunrepeatable cryptographic keys and to construct the key unpredictable to a hacker who is deficient of important knowledge about theuser\u27s biometrics. In this paper, generating the strong bio-crypt key based on fingerprint minutiae is presented. At first, the minutiae pointsare extracted from the fingerprint image based on image processing algorithms. Then, the extracted fingerprint minutiae are used forgenerating a 1024 bit prime numbers that used in RSA cypher algorithm to generate 2048 cryptographic key
Network Coded Modulation for Two Way Relay Networks
Get PDFModern wireless networks use cooperative relaying to expand its coverage area. Wireless relaying allows mobile terminals toparticipate in transmission even when these terminals are not being the initial source or final destination. This can be achieved in differentways ranging from simple conventional relaying to more sophisticated coding at terminal and relay nodes to improve transmissionperformance. The proposed work here studied such system by simulating different coding techniques to be used in two way relay networkcoding (TWRC). Some of these techniques were previously proposed to improve transmission performance in conventional datacommunication systems. BER performance of different arrangements of coding and relaying schemes are evaluated using computersimulation tests. Ideal AWGN channel model and standard wireless channel models for wireless networks are considered in the simulationtests. The results have been shown that coding schemes such as Trellis Coded Modulation (TCM) and Repeat Accumulate (RA) codes aremore suitable in two way relaying networks. Over AWGN, TCM-8PSK improves BER performance by at least 2 dB at high SNR fordifferent relaying arrangements. For fading channels, this advantage is slightly reduced. Regenerative repeating at relay node seems to be apromising arrangement. It seems that there is no sense in using RA codes over fading channels due to its poor performance and relativelylower speed caused by repetitions
Character Recognition Using Neural Network Learned by Artificial Bee Algorithm
Get PDFCharacter Recognition is the text recognition system that allows hard copies of written or printed text to be renderedinto editable, soft copy versions. In this paper, work has been performed to recognize pattern using multilayer perceptronlearning by Artificial Bee algorithm (ABC) that simulates the intelligent foraging behavior of a honey bee swarm. MultilayerPerceptron (MLP) trained with the standard back propagation (BP) algorithm normally utilizes computationally intensivetraining algorithms. One of the crucial problems with the BP algorithm is that it can sometimes yield the networks withsuboptimal weights because of the presence of many local optima in the solutions space. The suggested method is to use ABC forlearn the Neural Networks, to solve text character recognition problem, by update the Neural Networks weights. A comparisonstudies are made between ABC and BP methods in NN learning to specify which is better in solving character recognitionproblem
Partial Encryption in Digital Image Based On Plasma Encoding Techniques
Get PDFMany digital services require reliable security in storage and transmission of digital images. Due to the rapid growth of theinternet in the digital world today, the security of digital images has become more important and attracted much attention. The prevalenceof multimedia technology in our society has promoted digital images to play a more significant role than the traditional texts, whichdemand serious protection of users\u27 privacy for all applications. Encryption techniques of digital images are very important and should beused to frustrate unauthorized access from opponents. In this paper a new approach is proposed for partial encryption in digital imagebased on dragging the longest wavelength color in digital image then input the extract color to the plasma encoding algorithm to havepartial ciphered image that can be deciphered at the recipient side using the proposed retrieve algorithm. It is possible to apply multilevelfor the proposed approach to increase the security level with less time for encryption/decryption. The new approach test appeared that theencryption/decryption processes was very flexible and efficient
A Framework Prototype for E-Authentication of Iraqi Civil-Identity Certificate
Get PDFThe increasing needs for Iraqi citizens in getting the advantages of e-government services, administration anddemocracy motivates us to study and look for how to expand the e-government project of Iraq with new e-services. Theproposed framework considers a realistic problem in Iraq called the identity of the Civil Status. It verifies the (identity)validity of issued electronically instead of paperwork which takes significant time and effort to complete the transaction. Anelectronic interface is designed for the sake of the proposed framework using client-server approach assisted by PHP andMySQL software, intended to reduce the time and effort to improve job performance and provide interactive e-services tocitizens. The developed e-service can be classified as Government to Citizen (G2C) type of e-Government
Using Data Marts Approach in Iraqi Educational Institution process
Get PDFWorldwide, educational institution has channeled big investments towards building information systems. This paperdeals with data marts ideas, which is a database, or collection of databases, designed to help managers make strategic decisionsabout their business. In this paper we suggest a project named IC-DM for the educational institution which has access to twodifferent data marts that user will need to decide which is the most appropriate for the project that they are working on. Datafrom multiple sources, and multiple levels was linked, or merged into a data mart
Null Values Treatment in Distributed Databases
No full textThere has been a great deal of discussion about null values in relational databases. The relational model was defined in 1969, and Nulls Was died in 1979. Unfortunately, there is not a generally agreeable solution for rull values problem. Null is a special marker which stands for a value undefined or unknown, which means thut ne entry has been made, a missing valuc mark is not a value and not of a date type and cannot be treated as a value by Database Management System (DBMS). As we know, distributed database users are more than a single database and data will be distributed among several data sources or sites, it must be precise data, the replication is allowed there, so complex problems will appear, then there will be need for perfect practical general approaches for treatment of Nulls. A distributed database system is designed, that is "Hotel reservation control system, based on different data sources at four site, each site is represented as a Hotel, for more heterogeneity different application programming languages there are five practical approaches, designed with their rules and algorithms for Null values treatment through the distributed database sites. (1), (2), (3). 14). 15), (9)