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All Journal Polygon: Jurnal Ilmu Komputer dan Ilmu Pengetahuan Alam Neptunus: Jurnal Ilmu Komputer dan Teknologi Informasi
Zahara Vonna
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Computer Science & IT

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Perancangan Sistem Administrasi Pengelolaan Arsip Surat Masuk Dan Keluar Pada Biro Kesejahteraan Rakyat Berbasis Web Salsabila Arifa Hasibuan; Zahara Vonna; Ahmad Taufik Al Afkari Siahaan
Neptunus: Jurnal Ilmu Komputer Dan Teknologi Informasi Vol. 3 No. 1 (2025): Februari : Neptunus : Jurnal Ilmu Komputer Dan Teknologi Informasi
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/neptunus.v3i1.577

Abstract

Managing incoming and outgoing letter archives is an important aspect in supporting administrative performance at the Regional Secretary's People's Welfare Bureau. This research aims to design a web-based administration system that can increase effectiveness and efficiency in managing mail archives. The methods used in this research include requirements analysis, system design, and prototype testing. The results of the analysis show that the mail management process is currently still carried out manually, which results in difficulties in searching and archiving data. By designing a web-based system, it is hoped that it will make it easier for users to input, search and manage mail archives in real-time. The resulting system prototype is equipped with features such as mail data management, reports and notifications, which are designed to increase data accessibility and security. Test results show that this system can function well and meet user needs. It is hoped that this research can make a positive contribution to the Regional Secretary's People's Welfare Bureau in improving administrative performance through better archive management.
Implementasi Algoritma Caesar Cipher untuk Enkripsi dan Dekripsi Pesan Siti Fadiyah Nabila; Maisyarah Maisyarah; Zahara Vonna; Salsabila Arifa Hasibuan; Silfia Rahmadani Sitorus; Aninda Evioni; Ibnu Rusydi
Polygon : Jurnal Ilmu Komputer dan Ilmu Pengetahuan Alam Vol. 4 No. 1 (2026): Januari : Polygon : Jurnal Ilmu Komputer dan Ilmu Pengetahuan Alam
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/polygon.v4i1.925

Abstract

Information security is an essential aspect of digital communication, particularly in the exchange of text-based messages through open networks. Messages transmitted without protection are vulnerable to interception and unauthorized modification. One classical cryptographic technique that remains relevant as a foundational learning tool is the Caesar Cipher algorithm. This study aims to implement the Caesar Cipher algorithm for message encryption and decryption and to analyze its effectiveness and security level. The research method employed is a descriptive approach through literature review and a case study by applying character-shift techniques to text messages. The results indicate that the Caesar Cipher algorithm successfully transforms plaintext into ciphertext and restores it back to its original form through the decryption process. Although the algorithm is simple and easy to implement, it has significant limitations in terms of security due to its small key space and vulnerability to brute-force attacks. Therefore, Caesar Cipher is not suitable for protecting sensitive data but remains valuable as an introductory model for understanding basic cryptographic concepts.
Co-Authors Ahmad Taufik Al Afkari Siahaan Aninda Evioni Ibnu Rusydi Maisyarah Maisyarah Salsabila Arifa Hasibuan Silfia Rahmadani Sitorus Siti Fadiyah Nabila