TEKNIK PENYEMBUNYIAN DATA MENGGUNAKAN METODE KOMPRESI LEMPEL ZIV WELCH (LZW), END OF FILE (EOF) DAN ADVANCED ENCRYPTION STANDARD (AES) KEDALAM MEDIA GAMBAR FORMAT BMP

Abstract

The more sophisticated the technology, people can send or exchange messages to convey or send important information easily. Messages that are confidential or not will be sent to the recipient of the message, but messages made using the TXT can be replaced and damaged by irresponsible parties. There is a lot of knowledge in securing files that are used at this time including compression, cryptography, and steganography. The cryptographic algorithm used is Advanced Encryption Standard (AES-128), Ziv Welch Lemp compression algorithm (LZW) and End of File (EOF) steganography algorithm. In the research that will be carried out LZW Algorithm will do the txt data compression process. After that the compression results will be encrypted using the AES method and the last is to insert the encryption results into the bmp image using the EOF method. The results of testing in this study LZW, AES and EOF methods were successfully implemented when tested one by one, but could not be implemented properly when all of these methods were combined when tested. Where the data from the seven test data used are only two data that were successfully tested.