KRIPTOSISTEM MENGGUNAKAN ALGORITMA GENETIKA PADA DATA CITRA
Abstract: Data and information
security either those to be sent through the communication network or those to
be kept in a device has brought into attention of the user of this information
and data. Information and data security is being kept by making the data and
information are not able to be read or known by unauthorized users. This can be
done by using the cryptography technique. There are many cryptography
techniques has been created to meet the above purpose. This research dealt with
a new method in symmetric cryptosystem to encrypt digital image data using
genetic algorithm. This method uses some components of genetic algorithm, the
crossover operation and mutation operation, crossover rate and mutation rate,
and fitness function. The process includes creating the encryption and
decryption process using the crossover and mutation process. The crossover
process illustrates the transposition technique, while the mutation process
illustrates the substitution technique. This cryptosystem is applied to the
8-bit grayscale image using 2 (two) keys, random seed and number of generation.
The result of the research shows that cryptosystem using the genetic algorithm
is possible to be applied to the digital image. With 7000 or more as number of
generation, plain image is possible to be encrypted into unrecognized cipher
image, and by measuring the similarity of the image based on the pixel (pixel
based similarity), the result of decipher image is similar with the plain
image. The keys of the random seed affect the durability of the result of
encryption process, while the sum of the generation affects the randomization
of the cipher image and the running time (the time needed for the process).
Penulis: Magdalena Ariance
Ineke Pakereng
Kode Jurnal: jptinformatikadd080037
