Implementasi Rc4 Stream Cipher Untuk Keamanan Basis Data

Kemajuan teknologi yang sangat cepat mendorong setiap instansi untuk tetap mengikuti perkembangan teknologi dan terus meningkatkan kemampuannya dalam mengelola data-data dan informasi yang lebih aman, akurat, dan efisien yang dibutuhkan suatu instansi. Salah satu hal terpenting dalam komunikasi menggunakan komputer dan jaringan komputer adalah untuk menjamin keamanan pesan, data, ataupun informasi dalam proses pengiriman atau penyimpanan data, sehingga menjadi salah satu pendorong munculnya teknologi kriptografi. Kriptografi berbasis pada algoritma pengkodean data informasi yang mendukung kebutuhan dari dua aspek keamanan informasi, yaitu secrecy. Penggunaan algoritma RC4 Stream Cipher karena cukup mudah untuk digunakan secara luas pada beberapa aplikasi dan algoritmanya sudah dinyatakan cukup aman untuk diterapkan. Ada banyak model dan metode enkripsi, salah satu di antaranya adalah enkripsi dengan algoritma Rivest Code 4 (RC4). Hasil penelitian ini adalah penggunaan program Enkripsi RC4 Stream Cipher dengan jumlah karakter asli (plaintext) berhasil di enkripsi sama dengan jumlah karakter hasil enkripsi (chipertext) sehingga data yang di input akan di simpan pada database dalam keadaan terenkripsi sehingga keamanan dan kerahasiaan datanya dapat terjaga

Pengembangan Bahan Ajar Modul Matematika

The purpose of this study was to (1) describe the potential and conditions of the math instructional materials used in secondary schools in the Tulang Bawang Barat district, (2) develop a mathematical modules that can improve student learning outcomes, (3) test the effectiveness of the developed module which is associated with the increasing of students' mathematics learning outcomes. This research was conducted at SMPN 1 Lambu Kibang, SMPN 1 Tumijajar, and SMPN 1 Tulang Bawang Udik, in the Tulang Bawang Barat district.The conclusion of this study is (1) junior high school in Tulang Bawang Barat district has the potential for the development of the module, which is characterized by the absence of the module as teaching materials and the module which was for the whole time the goals of mathematics courses, (2) the product development is in the form of instructional materials mathematics statistics module, (3) module is effectively used as a teaching material because more than 60% of students pass the study.Tujuan penelitian ini adalah (1) mendeskripsikan potensi dan kondisi bahan ajar matematika yang digunakan di SMP di kabupaten Tulang Bawang Barat, (2) mengembangkan modul matematika yang dapat meningkatkan hasil belajar siswa, (3) menguji efektifitas modul yang dikembangkan dikaitkan dengan peningkatan hasil belajar matematika siswa. Penelitian ini dilakukan di SMPN 1 Lambu Kibang, SMPN 1 Tumijajar, dan SMPN 1 Tulang Bawang Udik, di kabupaten Tulang Bawang Barat.Kesimpulan penelitian ini adalah (1) SMP di kabupaten Tulang Bawang Barat berpotensi untuk pengembangan modul, yang ditandai dengan belum adanya modul sebagai bahan ajar dalam pembelajaran matematika dan buku yang digunakan selama ini tidak mendukung tercapainya tujuan mata pelajaran matematika, (2) produk pengembangan berupa bahan ajar modul matematika materi statistika, (3) modul efektif digunakan sebagai bahan ajar karena lebih dari 60% siswa tuntas belajar

Pembuatan Peta Semantik Pada Kegiatan Prabaca Untuk Meningkatkan Kemampuan Memahami Bacaan Siswa Sekolah Menengah

This study aims to improve the reading ability through thue use of semantics mapping. This study was an classroom action research and conducted in three cycles. The participants were nineth studets of class E of SMP Negeri 27 Surakarta. The result showed that there was an improvement in the percentace of formulating the semantics mapping, reading activity and ability. The effective learning procedure was as follows. The students surveyed the text, formulated semantics mapping with questions word 5W + 1 H which organized on the board underheadings, memorized the semantics mapping, read the text intensively that they could use their maps as a review of information gained, stated the information about topics in the semantics mapping, and answered the questions (take a test). The conclusion of this research is when students have a purpose for reading a selection, they find that purpose not only directs their reading towards a goal, but helps to focus their attention

The Effect of Capital Working Management on the Profitability

Companies must maintain the sustainability of their business. In order to keep their existence and competitiveness, they must increase their profitability in every year. It also applies to state fertilizer companies. However, during their 10 years of history (2005-2014), they have been facing difficulties in maintaining their business sustainability. Their profitability fluctuates and tends to decrease every year. One of the causes is inefficient working capital management. The objective of this study is to determine the relationship between working capital management and corporate profitability. To ensure the absence of the influence of unexamined factors, this study uses control variables of firm size, financial leverage, and gross domestic product. The results of this study indicate that state fertilizer companies will be able to increase their ROA by accelerating Days of Sales in Inventory and Days of Payables. Higher assets reduce profitability, and increasing debt withdrawal, which further decline the profitability. State fertilizer companies should accelerate their inventory turnover and obligation payments to their suppliers to minimize the risk of foreign exchange loss, considering that 80% of raw materials they needed are still imported. In addition, they should maintain asset quality and minimize debt withdrawal to increase their profitability