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All Journal Jurnal Sistem Informasi Kaputama (JSIK) Saturnus: Jurnal Teknologi dan Sistem Informasi
Sri Defriani Br Sembiring
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Computer Science & IT

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PENERAPAN KOMBINASI ALGORITMA OTP DAN RSA PADA FILE GAMBAR Meliala, Evan Syahputra; Fira Dwi Yanti; Anggi Meliana Br Hutasoit; Sri Defriani Br Sembiring; Achmad Fauzi
Jurnal Sistem Informasi Kaputama (JSIK) Vol. 9 No. 1 (2025): Volume 9, Nomor 1, Januari 2025
Publisher : STMIK KAPUTAMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59697/jsik.v9i1.955

Abstract

This study discusses the application of a combination of the One-Time Pad (OTP) and Rivest-Shamir-Adleman (RSA) algorithms to enhance data security in image files. The combination of these two algorithms offers higher security, with OTP used to encrypt image data with unique random keys, and RSA employed to securely encrypt the OTP key. This method leverages the strengths of each algorithm, namely OTP's mathematical security and RSA's key distribution capability. The results of the study indicate that this combination is effective in protecting image files from cryptographic threats, although challenges remain in terms of efficiency and compatibility with certain data formats. Keywords : Cryptography, OTP Algorithm, RSA Algorithm, Image file encryption, Data security, Hybrid encryption.
Sistem Pendukung Keputusan untuk Penilaian Kinerja Karyawan Biller di Kantor ULP Kuala Menggunakan Metode TOPSIS Sri Defriani Br Sembiring; Suci Ramadani; Anton Sihombing
Saturnus : Jurnal Teknologi dan Sistem Informasi Vol. 3 No. 4 (2025): Oktober : Saturnus : Jurnal Teknologi dan Sistem Informasi
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/saturnus.v3i4.1088

Abstract

Employee performance appraisal is a crucial aspect of human resource management and development, as the evaluation results serve as the basis for managerial decision-making, including promotions, incentives, and career development. However, unstructured assessment sistems often hinder the objectivity, transparency, and accuracy of performance evaluations. This study aims to design and develop a web-based Decision Support Sistem (DSS) to assess the performance of Biller employees at the ULP PLN Kuala office by applying the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS) method. TOPSIS was selected because it effectively addresses multi-criteria decision-making problems by comparing each alternative to both positive and negative ideal solutions. The evaluation criteria include invoice achievement, account return balance, and PAL balance. The sistem was developed using PHP as the programming language and MySQL as the database, ensuring integration and accessibility. The test results indicate that the sistem is capable of providing employee rankings in an objective and measurable manner. Based on the calculation, Tri Widodo achieved the highest score (0.8027), demonstrating the best performance among the evaluated employees. The implementation of this TOPSIS-based DSS makes the performance appraisal process more sistematic, efficient, transparent, and accurate, thereby contributing to the improvement of human resource management quality within the organization.  
Co-Authors Anggi Meliana Br Hutasoit Fauzi, Achmad Fira Dwi Yanti Meliala, Evan Syahputra Ramadani, Suci Sihombing, Anton