This research is presented experimental research of encoding data to compare the processing time encryption and decryption of the algorithms of three algorithms are algorithms DES, algorithm. Blowfish and AES-128 algorithm, which is the third algorithm is an algorithm that has been popular. These algorithms include three encrypted data with a number of different file types, including text, data, five alone (.text) file is divided into two equal-sized file in Thailand. And English, file type messages with pictures (.doc) file is divided into two equal-sized file in Thailand. File and English And the final image files (.jpg) file number one by all data files through data encryption and decryption for a total of 15 times, the average time to process a variety of data encryption and decryption of information. The average of all the algorithms to compare the average of the period. In order to get the best time and the best of the code and data decoding
results found. The size of plaintext affects the difference of the average time to process the encryption and decryption of data center and AES128 is the smallest.
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