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All Journal Riau Journal of Computer Science Knowbase : International Journal of Knowledge in Database RJOCS (Riau Journal of Computer Science)
Ramadhan, Hardiansyah
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Computer Science & IT

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KOMBINASI ALGORITMA KRIFTOGRAFI CAESAR CIPHER DAN PERMUTATION CIPHER UNTUK PESAN TEKS MENGGUNAKAN PYTHON Sihombing, Riyan Feraldi; Khairuna, Aida; Hasan, Mhd Arief; Sembiring, Rafael Rezky; Ramadhan, Hardiansyah
Riau Journal Of Computer Science Vol. 7 No. 1 (2021): Riau Journal of Computer Science
Publisher : Riau Journal Of Computer Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (496.14 KB)

Abstract

Currently, especially in the development of information technology is developing so rapidly. Safeguarding and protecting informational text messages from various parties that can harm is very important. Maintaining informed text messages has a science, like cryptography. Cryptography in text messages to protect important data so as not to harm the owner. Therefore, we need to improve text messaging, especially data such as document files and text messages. So, the authenticity of the data can be maintained safely. The combination of cryptographic algorithms used to secure text messages is the Caesar Cipher algorithm and the Permutation Cipher algorithm. So, by using a combination of the caesar cipher algorithm and the permutation cipher algorithm, the security level of text messages can be more maintained for the authenticity of the data.
KOMBINASI ALGORITMA KRIFTOGRAFI CAESAR CIPHER DAN PERMUTATION CIPHER UNTUK PESAN TEKS MENGGUNAKAN PYTHON Feraldi, Riyan; Khairuna, Aida; Hasan, Mhd Arief; Rezky, Rafael; Ramadhan, Hardiansyah
RJOCS (Riau Journal of Computer Science) Vol. 7 No. 1 (2021): RJOCS (Riau Journal of Computer Science)
Publisher : Fakultas Ilmu Komputer, Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/rjocs.v7i1.1825

Abstract

Saat ini, khususnya pada perkembangan teknologi informasi berkembang begitu pesat. Menjaga dan melindungi pesan teks informasi dari berbagai pihak yang bisa merugikan sangatlah penting. Menjaga pesan teks informasi memiliki ilmu, seperti kriptografi. Kriptografi dalam pesan teks untuk melindungi data-data yang penting agar tidak merugikan pemilik. Oleh karena itu, kami perlu meningkatkan pesan teks, terutama data seperti berkas dokumen serta pesan teks. Sehingga, keaslian data dapat terjaga dengan aman. Kombinasi algoritma kriptografi yang digunakan untuk pengamanan pesan teks yang digunakan yaitu algoritma caesar cipherdan algoritma permutation cipher. Sehingga, dengan menggunakan kombinasi algoritma caesar cipher dan algoritma permutation cipher, tingkat keamanan pesan teks bisa lebih terjaga keaslian datanya
K-Means Clustering in Determining the Category of Stock Items In Angkasa Mart Hardianto, Roki; Ramadhan, Hardiansyah; Putra Pane, Eddissyah; Yunefri, Yogi
Knowbase : International Journal of Knowledge in Database Vol. 2 No. 1 (2022): June 2022
Publisher : Universitas Islam Negeri Sjech M. Djamil Djambek Bukittinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30983/ijokid.v2i1.5411

Abstract

A good and accurate stock management system is crucial in any institution or organization that conducts product buying and selling transactions. This is done to improve stock efficiency, reduce storage costs, be more effective, and meet customer expectations. This research produced three groups of the most desirable products for large stock quantities, moderate stock quantities for products of interest, and low stock quantities for products that were less or not in demand. Data was processed using the clustering method, specifically the K-Means method, which was based on historical sales data that includes the product code, number of transactions, and average sales. This study was carried out using web-based calculations. Testing with the rapid miner application. The research yielded three members of the product group for large stock, 238 large stock, 273 medium stock, and 25 low stock.
Co-Authors Feraldi, Riyan Hardianto, Roki Khairuna, Aida Mhd. Arief Hasan, Mhd. Arief Putra Pane, Eddissyah Rezky, Rafael Sembiring, Rafael Rezky Sihombing, Riyan Feraldi Yogi Yunefri, Yogi