InfoTekJar : Jurnal Nasional Informatika dan Teknologi Jaringan
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Analisis Kompleksitas Diantara Algoritma Insertion Sort dan Selection Sort dan Diimplemntasikan dengan Bahasa Pemograman Java
Full text linkAnalisis kompleksitas algoritma merupakan hal yang sangat penting bagi orang ilmu komputer, dikarenakan dengan analisis kita akan bisa mengetahui kinerja performa dan keefisienan dari algoritma yang kita analisis tersebut. Algoritma pengurutan penyisipan(Insertion Sort) dan pemilihan(Selection Sort) akan menjadi pembahasan kita dengan mengimplementasikannya ke dalam bahasa pemograman java dengan mengukur kondisi terbaik(Best Case), terburuk(Worst Case), rata - rata(Average Case). Berdasarkan hasil dari analisis tersebut maka didaptkan algoritma pengurutan penyisipan(Insertion Sort) dan pemilihan(Selection Sort) memiliki efisiensi yang hampir sama, hanya untuk algoritma pengurutan penyisipan memiliki kelebihan apabila terdapat angka yang sudah hampir terurut
Analisis Keamanan pada Cloud Computing
Full text linkCloud Computing sudah menjadi salah satu tren baru di era internet ini. Clouds dimaksudkan sebagai sebuah Data Center yang letaknya bisa dimana saja sebagai tempat menyimpan dan memproses data, baik data perorangan ataupun profesional. Umumnya faktor kemananan menjadi kekhawatiran utama pengguna karena semua data yang berada di clouds dapat diakses siapa saja dan dari mana saja selama terkoneksi di internet. Paper ini akan memaparkan analisis keamanan yang diterapkan dan resiko yang dihadapi teknologi cloud computing ini
Perbandingan Sistem Operasi Android Kitkat dengan Android Lollipop
Full text linkAndroid merupakan sebuah sistem operasi yang berbasis linux untuk telepon seluler seperti telepon pintar dan komputer tablet. Android menyediakan platform terbuka bagi pengembang untuk menciptkan suatu aplikasi untuk di gunakan oleh berbagai macam mobile. Android juga merupakan code computer yang bisa di distribusikan secara terbuka (open source) sehingga pengembangan bisa mmebuat suatu aplikasi baru didalamnya. Ada beberapa android yang sangat banyak di minati oleh para pengguna handphone, seperti android kitkat yang memiliki keunggulan mampu memberikan tampilan status bar transparan serta dapat beroperasi secara optimal pada perangkat berspesifikasi rendah. Dan baru-baru telah diumumkan android Lollipop oleh google. Di paper ini penulis akan mencoba membahas perbandingan antara android Kitkat dan Lollipop. Menguraikan kelebihan dan kelebihan dari dua android tersebut
Kriptografi Klasik Menggunakan Modifikasi Metode Affine Ciphers
Full text linkCryptography is the science or art to maintain the security of messages that include the security aspects such as confidentiality, data integrity and authentication. One method that is able to encrypt messages Affine Ciphers modified. Plaintext encrypted with Affine Cipher using the equation E (P) = (ax + b) mod m, where m is the size of the alphabet, a is an integer relatively prime to m, b is the number of shifts, x is the plaintext is converted to an integer of 0 to m-1 in accordance with the order of the alphabet, E (P) is ciphertext that is converted to an integer of 0 to m-1 in accordance with the order of the alphabet. Affine Ciphers ciphertext is decrypted by using the equation D(E(P))=a-1(E(P)-b) mod m in order to obtain the plaintext
Design of Online Office Employee Attendance System on Website Based on HTML and CSS
No full textThe continuous development of technology makes everything sophisticated and easy, such as attendance that can be accessed online. In this study, an online office employee attendance system was designed on an HTML and CSS-based website, where on this website there is a time and map that can show the whereabouts of employees and what time they are absent so that it is expected to prevent fraudulent attendance such as entrusting attendance. The purpose of this study is to help the office with attendance problems so that the office can easily control all employees in terms of attendance and all incoming data will be neatly arranged so that the data will be easy to summarize. This study uses a method of collecting data from observation as well as designing and building. So that with the observation method used, it can be used to find out and obtain data that will be used in the design and building stage of this website. This website itself is designed using the HTML programming language as the initial stage of the website page framework and uses the CSS programming language to make the layout of the website more attractive
Studi Penyisipan Pesan Teks Terenkripsi Dalam Citra Digital Dengan Menggunakan Algoritma Vigenere Cipher dan Steganografi Least Significant Bit
No full textPesan merupakan salah satu media komunikasi antar satu individu ke individu lain. Pesan memiliki keragaman, mulai dari pesan yang bersifat umum dan pesan yang bersifat rahasia. Kerahasiaan yang terdapat dalam suatu pesan merupakan salah satu hal yang harus dijaga keamanannya sehingga pihak lain yang tidak memiliki otoritas untuk mengetahui kerahasiaan tersebut tidak dapat membukanya. Maka dari itu, muncul suatu teknik untuk mengenkripsi suatu pesan dengan algoritma kriptografi vigenere cipher. Suatu algoritma yang sulit untuk ditebak plaintextnya bahkan dikriptanalisis ciphertextnya. Tak hanya itu, pesan (plaintext) yang telah dienkripsi dengan vigenere cipher, ciphertextnya akan disisip ke dalam citra digital dengan metode steganografi LSB sehingga pesan rahasia (plaintext) akan tetap secure
Implementation of Oriented Programming Concepts Objects in The Parking System Application Using Java Programming Language
Full text linkThe development of Information Technology has become increasingly rapid. Many agencies or companies that have used information systems for operational processes that manually become an automated and integrated system. One of which is a parking system. In Indonesia there are still many vehicle day care stations that use a parking system manually. This makes the parking attendant unfamiliar with the price set and the lengths of time parked the vehicle and make it difficult in the process of calculating the report of parked vehicles. For this reason, an integrated parking system is needed so that it can be applied to manual vehicle storage. So in making the parking system uses the concept of programming. The concept of the program to be used is the concept of Object Oriented Programming with the Java programming language and the editor uses Netbeans 8.2 to run the program. The method in conducting this research is to use 2 methods, namely the method for collecting data with the description method and the method for developing a waterfall system. With the parking system will provide convenience for parking users and also make efficient parking attendant performance. So expect speed, and accuracy in collecting vehicle parking at a vehicle storage in Indonesia.
Prediksi Penyakit Kencing Manis (Diabetes Mellitus) Menggunakan Algoritma Klasifikasi Voting Feature Intervals 5
Full text linkPenyakit Diabetes Mellitus (DM) merupakan penyakit berbahaya yang menjadi penyebab kematian terbesar keempat di dunia. Penyandang DM terus meningkat sekitar 7 juta jiwa setiap tahun. Peningkatan tersebut disebabkan oleh perubahan pola hidup sehari-hari seperti kurangnya aktivitas, kebiasaan mengkonsumsi makanan tinggi lemak, karbohidrat dan faktor keturunan. Akibat kebiasaan tersebut menyebabkan kadar gula dalam darah meningkat sehingga menimbulkan komplikasi diantaranya adalah penyakit jantung, ginjal, hati, dan gangguan pada pencernaan yaitu dyspepsia.Penyakit dyspepsia memiliki gejala yang mirip dengan DM sehingga pada penelitian ini dijadikan sebagai penyakit untuk diagnose pembanding. Penerapan algoritme VFI 5 pada data pasien mampu memberikan hasil prediksi yang baik dengan menghasilkan akurasi rata-rata 90% dilakukan berdasarkan validasi silang dengan 3-fold. Hasil dari selang pelatihan pada algoritme VFI5 5 menyatakan bahwa penyakit DM dan dyspepsia memiliki gejala yang mirip, sehingga bagi orang awam sulit untuk membedakan kedua penyakit tersebut tanpa melakukan uji laboratorium
Attedance System with Face Recognition Based on Raspberry Pi using Viola Jones Algorithm
Full text linkIn the process of recording attendance at the company, there are many ways that can be used, such as using an attendance card, employee ID (Identity) and fingerprints. However, the existing methods still have the potential for fraud to occur, such as entrusting attendance cards or ID cards to other co-workers, manipulating time on attendance cards, doubling fingerprints etc., so we need another more precise method such as face recognition. This method was chosen because it is considered the most appropriate and very effective than other methods. This study builds a presence system using Raspberry Pi as an image processing controller, a camera to capture facial images and an ultrasonic sensor to detect the presence or absence of people, then the system will perform face recognition using Viola Jones algorithm, followed by validation where the input data will be matched with the data contained in the database and the resulting output in the form of attendance records used for recapitulation. After testing, accurate detection results were obtained when taking the right employee face data that with perpendicular position to the camera so that attendance can be recorde
RC4 GGHN Cryptography Algorithm for Message Security
Full text linkCryptography is a technique that is generally used in security in the process of exchanging information in the form of text messages, picture messages, or others involving two or more users. There are many types and classifications of cryptography developed to date that are able to provide security for the information sent. Modern cryptography that is popular and widely used is the Rivest Cipher (RC4) algorithm. RC4 cryptography is a type of stream cipher, which processes units or input data at one time. This research will use a combination of several message character lengths, namely 50, 100, 250, 500, 1000, 2500, 5000, 10000 characters, and tested using several key lengths, namely 5, 10, 25, 50, 100 characters. from testing with message length parameters and keys then the results will be compiled into a table and described into an image for easy understanding. Research results show it can be concluded that the length of the key used in encryption does not significantly affect the effectiveness of the system processing time. In addition, the length of the text has a big influence in determining the length of the system process in encrypting and decrypting messages. the more the number of characters that will be sent, the higher the processing time required to perform the security process once using the RC4 GGHN cryptography algorith