Abstract - Cryptography is an art and science to maintain data security. In maintaining the security of cryptographic data transforming clear data (plaintext) into a password (ciphertext) that cannot be recognized. This ciphertext is then sent by the sender to the recipient. After arriving at the recipient, the ciphertext is transformed back into a plaintext form so that it can be recognized. The method used is the encryption method asymmetrical Rivest Shamir Adleman (RSA). The security of the RSA algorithm lies in the difficulty of factoring large numbers into prime factors. Factoring is done to obtain a private key. Making this application using the PHP programming language. The final result is a desktop-based application that can be used to encrypt text files. This application can be used as a way to secure data, because only authorized people can view encrypted data.

Abstract - The rapid development of information technology has triggered many people to find alternative solutions to problems in the field of information system technology. As a case of a decision to choose a job, position or a particular career which is a series of consequences of decisions made by individuals at the stages of their lives in the past. The use of a support system for this decision can provide convenience to alumni in determining job choice in accordance with the ability or value of alumni data. The problem to be discussed in this study is how to choose the right job criteria using the Mamdani method.

bstract - In the world of education to achieve the level of success, of course, they have a benchmark for the success of students, one of them is the Grade Point Average (GPA). The purpose of this study is to determine the final GPA so that later it can be used as a reference to predict the success rate of students. The issue of decision-making systems using Fuzzy systems is very suitable for definite reasoning or estimation, especially for systems with strict mathematical models that are difficult to get a definite decision. Fuzzy logic can be used to describe a system of chaotic dynamics, and fuzzy logic can be useful for complex dynamic systems where solutions to common mathematical models cannot work well. The Mamdani method computes efficiently and works well with optimization and adaptive techniques, which makes it very good in control problems, especially for dynamic non-linear systems.

Abstract - The rapid growth of housing in Asahan has actually caused business competition among unhealthy housing developers. Problems that often arise due to unfair competition between developers are developers trying to market their housing without taking into account the quality and legality of the housing to be built. The choice of housing can provide convenience to consumers in determining housing choices from the value of the comparison of each housing chosen by the community. The problem to be discussed in this study is how to choose the right housing using the Analytical Hierarchy Process (AHP) method.

Abstract - Logic gate prototype aims to meet the needs and smoothness of the teaching and learning process in one of the digital circuit lecture materials. Proof of the logic of OR, AND, NOT, NOR, and NAND gates. The working principle of logic gate prototype is working based on input logic including 0 and 1. For AND logic gates are input multiplication gates consisting of (0,0, 0,1, 1,0, 1,1) and output consists of 1 for high (1) and 3 for low (0). For OR gate is the input sum gate consists of (0,0, 0,1, 1,0, 1,1) and the output consists of 3 high (1) and 1 low (0). For the NAND gate is the logic inverting gate of the AND input gate consisting of (0,0, 0,1, 1,0, 1,1) and the output consists of 3 high (1) and 1 low (0). For NOR input logic gate consists of (0,0, 0,1, 1,0, 1,1) and the output consists of 1 for high (1) and 3 for low (0). For the NOT gate is the inverse gate with input (1, 0) and the output consists of (0,1).

Abstract - A television station is a technology or communication media that displays both audio and visual broadcasts, both black and full color. The number of television stations currently makes fierce competition between television stations to innovate in making broadcasts that attract public attention to get highest rating But often because they want to pursue a rating, many television stations are less concerned about the quality of the broadcasts they display. Decision support system is a system that can be used as a tool to determine station quality television in displaying the broadcast. Data analysis is done by comparing television stations in Indonesia, namely the assessment is taken based on the level of educative, innovative, and human resources (television crew) contained in each television station. The results of the AHP method analysis are helpful conclusions people to know the best television stations as public consumption which tends to need information, knowledge and entertainment.

Abstract - In each company, agency, organization or business entity will provide salary as compensation for the work of an employee, in addition to providing basic salary to employees, each agency often provides salary bonuses in addition to basic salary to spur the performance and work productivity of its employees. As for the way used is to do the selection of employees according to the criteria by the leader, the salary bonus is given together with the salary each month. Criteria for determining employees who have priority to get salary bonuses include responsibility, work attitude, and honesty. Besides still using a conventional system, the closeness of the leader and employees often results in decisions that are different from the right thing. This causes the results of the decision to be inappropriate. The problem in this research is how to build a support system the decision to use the AHP method to help company leaders in determining employees who are entitled to receive bonuses.

Abstract - During this time in the village of Mekar Sari in making decisions for Raskin revenue still using manual methods. The problem is the difficulty in storing or searching the archives that have been stored, as well as the problem of making late reports that also hamper the delivery of information. Many families should not get Raskin but receive raskin too, on the contrary for poor families who should get Raskin but not get it. this research was conducted with the aim of developing a decision support system application that facilitates the parties to make decisions in the selection of poor families who are entitled to receive Raskin in Mekar Sari Dusun Village. The method used in system development is the TOPSIS method, where the topsis method is is one of the decision making methods where the chosen alternative is the best alternative that has the closest distance from the positive ideal solution and the farthest from the negative ideal solution.

Abstract - Smart cards, physically, are plastic cards the size of a credit card that can be filled with data for various purposes. A number of smart card uses include electronic cash payments, attendance systems, train and bus ticket subscription cards, toll road payments, and others. Smart Card Design for bedrooms using photodiode sensors and Arduino Uno based infrared sensors have succeeded well according to the procedure. The work system of the bedroom smart card series is very useful for efficient use of electricity in the household. The working system of photodiode sensors and infrared sensors is very both in a series that functions as a light sensor

Abstract - This research was conducted to create a cryptographic implementation of vigenere ciphers. This system is designed by analyzing the descriptive method, and the comparative method. After analysis, modeling is done with UML (Unified Modeling Language) and the design of vigenere cipher cryptography system with text encryption and decryption can be programmed using PHP software. The results of this study are an implementation of the vigenere cipher cryptographic system with PHP.

Abstract - The study of the characteristics of non-liier functions can be carried out experimentally and theoretically. One part of theoretical analysis is computation. For computational purposes, numerical methods can be used to solve equations complicated, for example non-linear equations. There are a number of numerical methods that can be used to solve nonlinear equations, the Newton-Raphson method.

Abstract - The increase in internet users throughout Indonesia has also increased the purchase of goods online. Most items purchased online use freight forwarding services. With many companies engaged in freight forwarding services, such as JNE, TIKI, POS, AND CARGO, making users get many alternatives to use freight forwarding services. Many factors influence online users in the selection of freight services, such as shipping time, price offered, services provided, to the reputation of the company.