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All Journal Syntax Jurnal Informatika JIKA (Jurnal Informatika) JIMTEK
Siti Muryanah
Universitas Islam Syekh Yusuf
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Industrial & Manufacturing Engineering

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Journal : Syntax Jurnal Informatika

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Aplikasi Enkripsi Kriptografi Dengan Algoritma Blowfish Dan Kompresi Huffman Dalam Security Dokumen Siti Muryanah; Syahriani Syam
SYNTAX Jurnal Informatika Vol 10 No 02 (2021): Oktober 2021
Publisher : Universitas Singaperbangsa Karawang

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Abstract

Pada umumnya di dalam kampus, perusahaan atau organisasi, suatu dokumen digital disimpan di dalam komputer begitu saja tanpa adanya pengamanan sama sekali, sehingga dapat memungkinkan pencurian data oleh pihak yang tidak berwenang. Penelitian ini bertujuan untuk mengamankan dokumen dari pencurian pihak yang tidak berwenang dengan pembuatan suatu aplikasi enkripsi atau perubahan plaint text menjadi cipher text dengan kriptografi algoritma Blowfish. Namun sebelum melakukan enkripsi, dokumen dikompresi dahulu dengan metode Huffman agar ukuran dokumen lebih kecil sehingga proses enkripsi lebih optimal. Hasil penelitian ini dapat menghasilkan suatu aplikasi yang dapat memperkecil ukuran dokumen dan mengubah dokumen asli menjadi dokumen acak (sulit dipahami isinya) dalam menjamin keamanan data.
Implementasi Hidden Text dengan Algoritma Blowfish dan Kompresi Huffman dalam Security Dokumen Siti Muryanah; Diah Rahmawati
SYNTAX Jurnal Informatika Vol 12 No 01 (2023): Mei 2023
Publisher : Universitas Singaperbangsa Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35706/syji.v12i01.8592

Abstract

Technological developments have positive and negative impacts for users. Information is easily and quickly accessed by anyone, anytime and anywhere. To maintain security, an effort is needed to secure information from unauthorized parties. Cryptography and steganography as a way to maintain the security of this information. The information we have (plain text) will be converted into random or hard-to-understand information (cipher text), commonly known as encryption. Furthermore, the random information will be hidden or inserted into the digital image (encoded) so that it will not make other people suspect that the digital image contains information that is being hidden. In a digital image that has been inserted with confidential information (stego image), there is no difference of visual man either before or after inserting the confidential information. This research succeeded in securing information in the form of documents in pdf, xlsx, docx, pptx and txt formats using Blowfish cryptography and LSB Steganography. The size of the document resulting from the encryption process becomes smaller with the Huffman compression process with an average value of 57% of the original document. The test uses 3 different files and 3 images in each file format, namely pdf, xlsx, docx, pptx and txt. Tests on stego images produce high quality with an MSE value of 0.092 and a PSNR of 57.12 dB.
Co-Authors ., Djamaludin Diah Rahmawati Didi Kurnaedi Mochamad Irvan Fadillah Muhammad Dede Iskandar Nazwirman Nazwirman Syahriani Syam SYAHRIANI SYAM Umam Ma'sum