IRJET-Color Image Encryption and Decryption Using DES Algorithm

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International Research Journal of Engineering and Technology (IRJET) Volume: 03 Issue: 07 | July-2016

www.irjet.net

e-ISSN: 2395 -0056 p-ISSN: 2395-0072

Color Image Encryption and Decryption Using DES Algorithm Manjula K G1, M N Ravikumar2 M.Tech (EC) (4th SEM), Dept. of ECE , Malnad College of Engineering , Hassan, India1 Associate Professor, Dept. of ECE , Malnad College of Engineering , Hassan, India2 ---------------------------------------------------------------------***---------------------------------------------------------------------

Abstract - Data Encryption Standard was the most well

cryptosystem that is nothing but for both encryption process and decryption process, using same secret key. Many algorithm keeps DES as their core design for cryptographic design. By upgrading DES's security, other algorithm' security, for example, Triple-DES and IDEA will be improved. In this project, a capable change is proposed to bring the legacy DES to live by strengthening its security.

known utilized cryptographic scheme and it is symmetric key block cipher algorithm. DES was a widely used cryptosystem for securing the classified data transmissions. In this project DES algorithm is utilized to image file encryption and decryption. The software implementations results are done with MATLAB. With detailed analysis Experimental results are explained and proposed plan has strength to resist the developing attacks on security of image file transmissions. The acquired results demonstrate that DES algorithm could be utilized as a highly secure algorithm.

2. CRYPTOSYSTEM Cryptography is art of making a cryptosystem is shown in Figure.1, equipped for giving data security. Cryptography manages the genuine securing of advanced information. It refers to the outline of systems in view of mathematical algorithms that give major data security administrations.

Key Words: DES, decryption, encryption

1. INTRODUCTION These days the data security is the important aspect of digital data communications. Since this information happen to more significance and secrecy like managing account information, military information, delicate data like medical records, and multimedia data, for example image, sound, or video. This requires a need of satisfactory and successful cryptographic algorithm to secure these sorts of information transmissions from an unauthorized user revealing. Then again, the pace of the innovation and the improvements in the field of computational processing speed in our lives is turning out to be quicker and speedier. These improvements facilitate the threats and attacks on the information or data to uncover its secrecy progressively and load the enormous test of fulfill the undertaking of securing the communications.

Figure 1: Cryptosystem

2.1 Security services of Cryptography Authentication- Identity of the receiver and sender should be verified in communication system, before sending as well as receiving the information in system. Secrecy or confidentiality-In the secured system, this is a task of the system to how best security which people maintain. Authorized users are capable to understand and access the data in the system.

Best approach of security assurance is Encryption. For changing input image into another image, encryption system used many techniques. So that changed image is difficult to understand by other unauthorized person and to maintain the secret of images between clients. Another advantages of encryption technique is can’t access the image information without decryption key. Main application of image encryption is multimedia frame work.

Integrity-Assurance of the transmitted data has to be free for any alternation between sender and receiver in communication. Non repudiation- guarantees the package security, element can't decline the responsibility for past activity. This is nothing but information sender and receiver certification.

Here we are using established cryptographic algorithm that is Data Encryption Standard (DES). DES was a generally utilized cryptosystem for securing the characterized information transmissions. DES is a symmetric key

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