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All Journal IJCCS (Indonesian Journal of Computing and Cybernetics Systems) Jurnal Teknologi Informasi dan Ilmu Komputer JURNAL MEDIA INFORMATIKA BUDIDARMA Jurnal Teknik Informatika UNIKA Santo Thomas METHODIKA: Jurnal Teknik Informatika dan Sistem Informasi J-SAKTI (Jurnal Sains Komputer dan Informatika) IJISTECH (International Journal Of Information System & Technology) KOMIK (Konferensi Nasional Teknologi Informasi dan Komputer) The IJICS (International Journal of Informatics and Computer Science) JURIKOM (Jurnal Riset Komputer) Jatilima : Jurnal Multimedia Dan Teknologi Informasi JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH) Journal of Computer System and Informatics (JoSYC) INFOKUM TIN: TERAPAN INFORMATIKA NUSANTARA Jurasik (Jurnal Riset Sistem Informasi dan Teknik Informatika) IJISTECH Journal of Informatics Management and Information Technology J-SAKTI (Jurnal Sains Komputer dan Informatika) Bulletin of Information Technology (BIT) Jurnal Teknik Informatika Unika Santo Thomas (JTIUST) Jurnal ABDIMAS Budi Darma Jurnal Sains dan Teknologi Informasi KETIK : Jurnal Informatika
Taronisokhi Zebua
Universitas Budi Darma, Medan
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Nursing Physics Social Sciences Veterinary Other

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Journal : journal of informatics management and information technology

 1 
Penerapan Algoritma Gost Dan Mode Output Feedback Untuk Tingkat Keamanan Citra Digital Sri Wahyuni; Surya Darma Nasution; Taronisokhi Zebua
Journal of Informatics Management and Information Technology Vol. 1 No. 4 (2021): October 2021
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/jimat.v1i4.128

Abstract

Digital images that are private and confidential are very vulnerable to wiretapping by irresponsible parties. Especially if it is distributed over the internet such as chat-based applications, WhatsApp and e-mail media. The image that is sent is sometimes an image that is confidential and must be protected. In order to maintain the security of digital images, cryptographic techniques can be used. Cryptographic techniques can secure digital images by changing the pixel values ??of the digital image so that it produces a different pixel value from the original image to be secured. In this study, the algorithm used is the GOST algorithm by adding the OFB technique to optimize the GOST key, and the encryption results can be sent via an application that will be designed with a client-server model. Creating a client-server-based encryption and decryption software application, aimed at transferring digital data in the form of a plain image that has been encrypted using the GOST algorithm, and can be distributed locally using an IP address connected to the same network on the sending and receiving computers (client-server)
Modifikasi Algoritma XTEA dengan Pembangkitan Kunci Menggunakan Metode Linear Congruential Untuk Pengamanan File Dokumen Berliana Oktaviani Sinaga; Sinar Sinurat; Taronisokhi Zebua
Journal of Informatics Management and Information Technology Vol. 1 No. 4 (2021): October 2021
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/jimat.v1i4.130

Abstract

Confidential document files must have security both when the file process is sent or stored in the stroge media. This is done so that the confidential document file is not known by someone who does not have authority over the file, or to avoid loss if the file falls into the wrong hands. In order to achieve this, a document file security technique is needed that can convert document file data into unrecognized data. One of the techniques that can be used is cryptography. Cryptography makes use of algorithms to encode document files with an encryption process, and restore document files with a decryption process. One of the algorithms that can be used is the XTEA algorithm. XTEA divides the document file string into 2 parts, namely AL 32 bit and BL 32 bit. The weakness of the XTEA algorithm when carrying out the encryption or decryption process with repeated key scheduling so that it is not effective in optimizing the security of encrypted document files, therefore in this study the Linear Congruential Generator (LCG) method is added to generate XTEA keys. LCG has values ??a, c, m and X0 which triggers to get the XTEA key. So that in the process of distributing encrypted document files, the key sent is the LCG trigger value in the form of a, c, m and X0, if the value is known by the attacker, the encrypted document file cannot be returned. So that the results of the XTEA encryption algorithm with key optimizer based on the LCG method produce a document file cipher that is more optimal in security
Co-Authors - Pristiwanto, - A M Hatuaon Sihite A.A. Ketut Agung Cahyawan W Aditya Trinugraha Agung Lestari Alfarizi, Muhammad Alimah Alimah Anas, Irfan Anda Yanny Arry Fahriza Berliana Oktaviani Sinaga Citono Harahap Dahanum, Ismay Dian Pratiwi Diana, Mia Dina Lestari, Dina Fince Tinus Waruwu Firman Telaumbanua Fitarius Humendru Garuda Ginting Guidio Leonarde Ginting Halawa, Peber Epenetus Hartika Manao Hasibuan, Alima Hakkon Hikka Sartika Hukendik Hutabarat Imam Saputra Indra Williamsyah Sinaga Ismay Dahanum Juni Ade Nawer Purba Khasanah Khasanah Lubis, Utami Rahma Sari Lubis, Utami Rahma Sari Mahadi Winafil Mesran, Mesran Nastiti, Sindy Natalia Silalahi Ndruru, Eferoni Nelly Astuti Hasibuan Neti Rusri Yanti Nopiyah Belia Batubara Nurdiyanto, Heri Nurma Ningsih Nurwijayanti Pristiwanto Pristiwanto Pristiwanto, Pristiwanto Rivalri K Hondro Rivalri Kristianto Hondro Ronda Deli Sianturi Sabrina Adinda Putri Sari, Herlina Sembiring, Abdul Sani Silalahi, Yohanna Silalahi, Yohanna Sinurat, Sinar Sitepu, Riezky Dermawan Syam Soni Bahagia Sinaga Soraya Rahma Hayati Sri Wahyuni Suginam Surya Darma Nasution Syukur Novertiani Gulo Tari, Ratiya Tiffani Astrid Winafil, Mahadi Winda Winda Yulrismawati Sihura Zega, Hendra Jaya Zega, Zulfan Anugerah