ENHANCED DATA SECURITY ALGORITHM USING MODIFIED IMAGE RANDOMIZED LEAST SIGNIFICANT BIT AND EXCLUSIVE-OR ENCRYPTION

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dc.contributor.authorUBON, OWOIDIGHEABASI MICHAEL
dc.date.accessioned2017-11-15T07:43:53Z
dc.date.available2017-11-15T07:43:53Z
dc.date.issued2017-01
dc.descriptionA DISSERTATION SUBMITTED TO SCHOOL OF POSTGRADUATE STUDIES AHMADU BELLO UNIVERSITY, ZARIA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE AWARD OF A MASTER DEGREE IN COMPUTER SCIENCE DEPARTMENT OF COMPUTER SCIENCE FACULTY OF PHYSICAL SCIENCE AHMADU BELLO UNIVERSITY, ZARIA, NIGERIAen_US
dc.description.abstractSecurity of data over unsecured channel is a global issue. Image steganography and Exclusive-OR (XOR) encryption are techniques employed to ensure data security. This dissertation develops and implements an algorithm that further improves the traditional image Least Significant Bit algorithm. Encryption of secret message was performed using 64 bits key and plaintext to obtain a cipher text. Each bits of the cipher text were hidden randomly using specific condition in red and blue planes of a selected cover 24 bits colour image. Extraction of the embedded cipher text was done as well as decryption of cipher text back to plain text. Experimental results showed that the proposed algorithm hides significant amount of data and extract it successfully without any loss at a very good Peak Signal to Noise Ratio (PNSR) of above 60dB. The statistical analysis of cover and stego image showed no much difference which further proved the proposed technique is more secured and efficient for private communication. Steganalytic result showed that the algorithm survives steganalysis test. Based on these results, the algorithm out performs other algorithm considered in the study.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/9393
dc.language.isoenen_US
dc.subjectENHANCED DATA SECURITY ALGORITHM,en_US
dc.subjectMODIFIED IMAGE RANDOMIZED LEAST SIGNIFICANT BIT,en_US
dc.subjectEXCLUSIVE-OR ENCRYPTION,en_US
dc.titleENHANCED DATA SECURITY ALGORITHM USING MODIFIED IMAGE RANDOMIZED LEAST SIGNIFICANT BIT AND EXCLUSIVE-OR ENCRYPTIONen_US
dc.typeThesisen_US
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