REKAYASA ALGORITMA CAESAR CIPHER DALAM BENTUK RGB MENGGUNAKAN ASCII

M IRHAN HAFIEZ, NIM. 14650001 (2018) REKAYASA ALGORITMA CAESAR CIPHER DALAM BENTUK RGB MENGGUNAKAN ASCII. Skripsi thesis, UIN SUNAN KALIJAGA YOGYAKARTA.

Preview	Text (REKAYASA ALGORITMA CAESAR CIPHER DALAM BENTUK RGB MENGGUNAKAN ASCII) 14650001_BAB-I_IV-atau-V_DAFTAR-PUSTAKA.pdf Download (7MB) | Preview
	Text (REKAYASA ALGORITMA CAESAR CIPHER DALAM BENTUK RGB MENGGUNAKAN ASCII) 14650001_BAB-II_sampai_SEBELUM-BAB-TERAKHIR.pdf Restricted to Registered users only Download (2MB)

Abstract

Technology plays an important role in the development of the era, as in the field of information security. Information security has several methods, one of them is cryptography. Cryptography is science and art for storing messages, data, or information securely. Caesar cipher is one method of crypthography. ASCII is an international standard in letters and symbols such as Hex and Unicode that used by computers to show text. RGB is an image whose it’s pixels intensity value is composed of three color channels, red, green and blue, and combined to form a wide array of colors. In this research, the author propose how to engineer caesar cipher algorithm into RGB image form by using ASCII’s characters. The research’s first step is collecting printable characters of ASCII, which is used as plaintext. Then, the data will be encrypted in caesar cipher by entering the key value for character shifting. Next, ciphertext that has been formed will be processed into decimal values so it can form the value of RGB. From the RGB’s value that has been obtained, it will be processed into the form of color image that indicates the encryption process ends. Entering the decryption process, the image will be read as RGB’s value and will be returned into ciphertext form. Final step, the ciphertext will be decrypted into original plaintext form. For the test of this research, input five of test data containing ASCII characters in range 32-255 which obtained from respondents and inserting the key value, then will be encrypted then forming an image file. This file attempted to be returned to original plaintext. The results of both processes were tested for accuracy by comparisoning between the initial plaintext with the plaintext result of image file decryption. Then, the results show the test data succesfully pass the encryption and decryption process with 100% accuracy level. From the experimental result formed a questionnaire that tested the weakness of engineering result that may be useful for further research.

Share this knowledge with your friends :

Actions (login required)

View Item