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All Journal Jurnal Pseudocode Joined Journal (Journal of Informatics Education Jurnal Inovasi Pendidikan dan Sains Journal of Computer Networks, Architecture and High Performance Computing Jurnal Anugerah: Jurnal Pengabdian Kepada Masyarakat Bidang Keguruan dan Ilmu Pendidikan Jurnal Abdimas Bina Bangsa Jurnal Sosial dan Abdimas Tematik International Journal of Electrical and Intelligent Engineering
Dewi Purnamasari
Universitas Ivet
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Journal : joined journal journal of informatics education

 1 
Implementasi Algoritma Kriptografi Caesar Cipher dan Rail Fence Cipher untuk Keamanan Data Teks Menggunakan Python Dewi Purnamasari
Joined Journal (Journal of Informatics Education) Vol 4 No 1 (2021): Volume 4 Nomor 1 (2021)
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/joined.v4i1.1697

Abstract

Security and confidentiality in communicating become a necessity so that the information sent and received is not misused by irresponsible parties. Cryptography not only provides a tool for information security but is also a useful technique for the security and confidentiality of information. This study aims to implement the Caesar Cipher and Rail Fence Cipher algorithms to determine the encoding process and also to determine the effectiveness of the encryption time and description of the two cryptographic techniques. The processing time of the two methods shows that the description time is longer than the encryption process. The average execution time of the Caesar Cipher algorithm is faster than the Rail Fence Cipher. The average encryption time is 0.0000802 second and the description time is 0.000131 second, however Rail Fence is more secure because the text process is sent in a zig zag form, so the received ciphertext is more secure than Caesar Cipher. Caesar Cipher is faster because the letter encoding process is shifted as many keys as desired. Keywords: Caesar Cipher, Rail Fence Cipher, Key, ziq zaq, Plaintext, Chipertext
Rancang Bangun Sistem Informasi Survei Kepuasan Pelanggan Berbasis Web menggunakan Metode Prototype (Studi Kasus Pada Toko Audi Elektronik Semarang) Dinda Resti Octaviana; Dewi Purnamasari; Kurniawati Kurniawati
Joined Journal (Journal of Informatics Education) Vol 8 No 1 (2025): Volume 8 Nomor 1 (2025)
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/joined.v8i1.3895

Abstract

Toko Audi Elektronik Semarang merupakan toko ritel yang bergerak di bidang penjualan barang elektronik belum memiliki sistem untuk mengumpulkan umpan balik pelanggan, baik melalui kotak saran maupun survei kepuasan pelanggan sehingga menyulitkan mengevaluasi kualitas layanan dan produk. Penelitian ini bertujuan untuk merancang dan membangun sistem informasi survei kepuasan pelanggan berbasis web bertujuan untuk mempermudah proses pengumpulan, penyimpanan, dan analisis data kepuasan pelanggan secara lebih sistematis dan terstruktur. Metode yang digunakan adalah metode prototype berdasarkan masukan pengguna. Pengujian sistem dilakukan dengan metode black box testing difokuskan pada aspek fungsionalitas. Hasil pengujian menunjukkan bahwa seluruh fungsi utama pada sistem, seperti pengisian survei, penyimpanan data, dan penampilan hasil survei, berjalan sesuai dengan skenario yang telah dirancang. Dengan demikian, sistem ini dinilai telah memenuhi aspek fungsional yang dibutuhkan dan siap digunakan sebagai sarana untuk mendukung evaluasi layanan dan pengambilan keputusan berdasarkan umpan balik pelanggan.
Co-Authors Aeni Nikhlah Ahmad Riki Andreas Akhmad Nayazik Didin Herlinudinkhaji, Didin Dinda Resti Octaviana Handini Arga Damar Rani Isti Mulyawati Jumrianto Jumrianto Jumrianto Jumrianto Jumrianto Jumrianto, Jumrianto Kurniawati Kurniawati Kurniawati Kurniawati lenny kurniati, lenny Lingga Kurnia Ramadhani Masruroh, Nila Masalikul Nindita Erwanti Prasetyani, Henny Riffa Bella Wahyu Santiago Criollo-C Sri Widayati Sudomo, R. Irlanto Tsalatsatun Nur Rohmah Yunifa Miftachul Arif