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All Journal Jurnal Teknik Indonesia (JU-TI) Jurnal Inovasi Teknologi dan Komputer
Yebi Susani Rajagukguk
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Engineering Other

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Steganography of Text Insertion into Image with End of File (EOF) Method Sanbenfri Saragih; Eric Simanjuntak; Yebi Susani Rajagukguk; Diva Ferdinan Silalahi; Shevchenko Lumbanbatu
Jurnal Teknik Indonesia Vol. 2 No. 01 (2023): Jurnal Teknik Indonesia (JU-TI) Juni, 2023
Publisher : SEAN Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/ju-ti.v2i01.661

Abstract

Steganography is a technique for hiding information in digital media with the aim of maintaining data confidentiality. This study discusses the End of File (EOF) method for inserting text into digital images without changing the image pixels. This method works by adding text data in binary form to the end of the image file, which allows re-extraction without visual distortion. In this study, an experiment was conducted by inserting the text "Hello" into an image file of 86.61 KB. The encryption process involves converting the text into 8-bit ASCII code, adding an EOF Marker (111111111111110), and storing the data into an image file. The calculation results show that text insertion increases the image size by 7 bytes, making the final image size 86.61 KB. This method has proven effective in inserting messages without changing the visual structure of the image. However, the file size increases with the length of the inserted message. This study provides insight into the use of the EOF method in steganography and its potential for application in digital data security.
Analisis Kerja dan Keamanan Algoritma Enkripsi AES pada Protokol SSH di Debian Server Erick Simanjuntak; Yebi Susani Rajagukguk; Vicky Andreas Nainggolan; Oloan R Simanjuntak
JITKO : Jurnal Inovasi Teknologi dan Komputer Vol. 2 No. 01 (2024): Jurnal Inovasi Teknologi dan Komputer (JITKO)
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jitko.v2i01.136

Abstract

Penelitian ini bertujuan untuk menganalisis kinerja dan keamanan algoritma enkripsi Advanced Encryption Standard (AES) pada protokol Secure Shell (SSH) di server berbasis Debian. Metode yang digunakan adalah pendekatan kuantitatif eksperimental melalui pengujian langsung terhadap tiga varian AES, yaitu AES-128-CTR, AES-192-CTR, dan AES-256-CTR. Parameter yang diuji meliputi waktu koneksi, kecepatan transfer data, dan penggunaan CPU. Hasil penelitian menunjukkan bahwa AES-192-CTR memiliki waktu koneksi tercepat sebesar 1,908 detik, sedangkan AES-128-CTR menghasilkan kecepatan transfer tertinggi sebesar 130,2 MB/s dengan waktu transfer 42,242 detik. Di sisi lain, AES-256-CTR memiliki tingkat keamanan paling tinggi, namun membutuhkan sumber daya CPU terbesar hingga 51,7%. Dengan demikian, terdapat trade-off antara performa dan keamanan, di mana pemilihan algoritma harus disesuaikan dengan kebutuhan sistem.
Co-Authors Diva Ferdinan Silalahi Eric Simanjuntak Erick Simanjuntak Oloan R Simanjuntak Sanbenfri Saragih Shevchenko Lumbanbatu Vicky Andreas Nainggolan