This study examines whether the function f(x)=x2-9x-99 can be used as a key generator in cryptography. The quadratic function is regenerated using the fixed point iteration method into an iteration function. The distribution of digits to the output of iterative function to generate a number of chaos. Randomization testing uses run test and monobit testing. Followed by cryptographic testing to get the correlation between ciphertext and key which will be used as a decision whether the resulting key is random or not. Based on research that has been done iteration function xi = (xi-12-9xi-1-99)/9 can generate CSRPNG Chaos random numbers with the correlation level closest to the value of 0.

Based on the Department of Agriculture which still does not have the tools or media to manage the letter of service, both the incoming and outgoing mail which impact on the weak supervision follow-up of the service letter due to ignorance that the letter should be processed. This study was made as a visual and text notification of incoming and outgoing mail data with more detailed archive storage. This website application is supported by using social media telegram API service that is used as notification in the form of notification to the employee so that the Service Letter can be followed up immediately.

Optimized Link State Routing (OLSR)is one of the two standard for mesh networks. OLSR is a link state routing protocol, which use hallo message and topology control (TC) to determine the link state information across the mobile ad-hoc network. OLSR is widely used in the wireless mesh network. Raspberry Pi is a mini computer which can be used as a node router to replace the function of a router in a wireless mesh network. In this research, Raspberry Pi is used as a router nodes to determine the performance of routing protocol OLSR. The parameters used to measure its performance is self-configure time, self-healing and bandwidth usage. The test results showed that the use of routing protocols OLSR on the Raspberry Pi in a wireless mesh network proved able to repair itself if there is a problem on the network since it has ability to self-configure and self-healing.

The Intrusion Prevention System (IPS) Snort is a server security System that can prevent attacks by examining and recording all data packets as well as recognizing packets with sensors, when the attack has been identified, IPS Snort will deny the access (block) and log of all data packets identified. However by using only IPS Snort which can only check and note the Allert attacks that are incoming in less sense to secure a server by collaborating with the other server's secure system in the sense of being able to make the network security of the server better. Honeypot Artillery chosen which works when there is a Hacker trying to penetrate through open ports can be detected as if hackers can break through the system, then Honeypot Artillery will provide information about who attackers and how the attacker could enter the Snort IPS system for later record in the database that can be viewed on the Web interface, Allert recorded on the experiment that has been done in the database as much as 9453 on TCP protocol as much as 9%, UDP as much as < 1%, and ICMP As much as 91%.

Penelitian ini membahas bagaimana cara melakukan deteksi kesalahan penulisan tenses Bahasa Inggris dengan menggunakan metode stemming. Algoritma yang digunakan untuk melakukan stemming adalah algoritma Confix Stripping.  Algoritma Confix-Stripping (CS) berdasarkan pada aturan morfologi bahasa Indonesia yang dikelompokkan menjadi satu dan di-enkapsulasi pada imbuhan, termasuk awalan, akhiran, sisipan, dan kombinasi. Algoritma Confix-Stripping (CS) menggunakan tiga komponen: kumpulan imbuhan, rule-rule, dan kamus. Pada penelitian ini akan dilakukan analisis penerapan algoritma Confix-Stripping (CS) tersebut pada Information Retrieval system. Kalimat yang akan dideteksi dipisahkan menjadi kata per kata untuk kemudian di tentukan posisinya di dalam kalimat. Setelah posisi setiap kata ditentukan, kata yang mendapatkan posisi sebagai verb akan melalui proses stemming untuk mendapatkan bentuk kata dasarnya. Setelah didapatkan kata dasarnya maka bentuknya akan dirubah sesuai dengan bentuk tenses dari kalimat. Penggunaan metode stemming dengan algoritma Confix Stripping dijalankan untuk melakukan deteksi kesalahan penulisan tenses Bahasa Inggris

In data mining a series of processes are applied to extract information from a data set. PT. XYZ which has a lot of sales data that can be processed. In the company PT. XYZ which is engaged in the retail sector which has tight competition and develops rapidly, customer satisfaction is one of the things that need to be considered. It takes more than product quality, but service to customers is also important to win competition in sales and one that can be considered in customer satisfaction is the availability of products that customers want. Use of Clustering Method to classify objects based on similarity in characteristics, especially one of fuzzy clustering, that is, fuzzy C-means can be used to determine the distance and presence of each point in a cluster. In this study, fuzzy C-means is applied in determining the supporting warehouse of PT. XYZ is based on the clustering location of PT. XYZ which is represented as the Cartesian coordinates and the centroid of each cluster refers to the location of the supporting warehouse along with the grouping of outlets with the supporting warehouse.Using 3 clusters in 100 iterations the difference in objective function is 3.3e-8%, while the experiment using 4 clusters requires 39 iterations with an objective function difference of 1.1e-12%,then themore number of clusters will minimize the difference in objective functions for results with smaller errors.

Persaingan global menuntut perusahaan  untuk bergerak dinamis mengikuti arus perubahan,  salah satu hal yang  dapat dilakukan yaitu menggunakan sistem informasi. CV XYZ sudah memiliki sistem informasi  namun  masih ada beberapa bagian yang belum menerapkan sistem informasi. Pengambilan data pada penelitian ini menggunakan metode wawancara dan observasi untuk mengetahui lingkungan bisnis dan lingkungan sistem informasi perusahan. Metode yang digunakan pada penelitian ini adalah Ward and Peppard dengan analisis SWOT, analisis Value Chain, Five Forces Porter, dan Mc Farlan’s Strategic Grid. Penelitian ini menghasilkan rekomendasi strategi, memberikan analisis lingkungan internal, eksternal sistem informasi perusahaan  dan usulan sistem informasi yaitu Sistem informasi HRD, Sistem informasi After Service, Sistem informasi Supplier, Sistem informasi customer services, Sistem informasi administrasi, dan Sistem informasi promosi, yang menjadi prioritas sesuai dengan pemetaan Mc Farlan’s Strategic Grid, dan dapat diterapkan perusahaan dalam kurun waktu 3 (tiga) tahun mendatang.

Badan Keuangan Daerah (BKD) Kota Salatiga adalah instansi pemerintah yang telah berdiri sejak 2004 atas keluarnya Undang-Undang Nomor 32 tahun 2004 tentang pemerintah daerah. Pada era globalisasi ini, sistem informasi tumbuh sangat pesat, dibuktikan dengan data yang menunjukkan perkiraan pengeluaran investasi teknologi informasi global pada tahun 2022 mencapai $4,2 triliun namun fenomena yang terjadi justru makin maraknya kecurangan yang terjadi dalam pemanfaatan sistem informasi dan teknologi informasi ini seperti kasus hilangnya uang nasabah BRI dan bocornya data pengguna aplikasi transportasi online. Pada penelitian ini menggunakan COBIT 5.0 dengan pada tahap pertama melakukan identifikasi stakeholder needs dengan melakukan wawancara kemudian pada tahap selanjutnya memetakan enterprise goals menggunakan Balance Scorecard, lalu mengidentifikasi IT related goals (ITRG) serta memilih EDM sebagai fokus penelitian dengan kelima subdomain. Berdasarkan hasil penelitian evaluasi menggunakan pendekatan capability level pada domain Evaluate, Direct and Monitor, Badan Keuangan Kota Salatiga mendapatkan nilai rata-rata skor 2 yaitu mencapai level managed.