Articles

Implementasi Basisdata Terdistribusi Pada Sistem Kenaikan Gaji Berkala Dinas Infokom Provinsi Maluku Latubessy, Anastasya; Ashari, Ahmad
IJCCS - Indonesian Journal of Computing and Cybernetics Systems Vol 6, No 2 (2012): IJCCS
Publisher : Indonesian Computer, Electronics, and Instrumentation Support Society (IndoCEISS)

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Abstract

AbstrakKemampuan socket yang bekerja pada komunikasi low level dalam melakukan transfer data antar aplikasi, diharapkan dapat diterapkan dalam sistem basis data terdistribusi. Beberapa alasan untuk membangun basis data terdistribusi adalah pemakaian bersama, kehandalan, ketersediaan, dan kecepatan pemrosesan query. Dengan pertimbangan tersebut, instansi-instansi baik pemerintah maupun swasta mulai tertarik untuk menggunakan sistem terdistribusi dalam pengelolaan pekerjaan pada instansinya. Hal ini dijadikan alasan untuk membangun sistem kenaikan gaji berkala otomatis di Dinas Informasi dan Komunikasi (Infokom) Provinsi Maluku. Selain itu, belum adanya sistem terkomputerisasi yang menangani sistem ini. Sistem kenaikan gaji berkala merupakan sistem yang bersifat kritis atau penting karena berhubungan dengan masalah uang, sehingga diperlukan juga sebuah sistem yang fault tolerant.Arsitektur sistem dibangun dengan metode client server yang memanfaatkan socket sebagai middleware dalam proses komunikasi pada jaringan. Menggunakan pendekatan full replica dengan pendekatan file replication using a group untuk menjamin konsistensi data. SQL Statement yang dikirimkan client akan diubah kedalam format XML yang kemudian akan dikirimkan ke kedua basisdata server menggunakan socket. Model redundansi data dan rendundansi proses diatur oleh middleware socket. Hasil yang diperoleh dalam penelitian ini adalah aplikasi socket sebagai middleware yang menangani distribusi data dari aplikasi web client ke basisdata server yang diimplementasikan pada sistem kenaikan gaji berkala otomatis di Dinas Infokom Provinsi Maluku.  Kata kunci— Socket, basisdata terdistribusi, client server AbstractSockets ability to transfer data between application  that work on the low level communication was expected to be implemented in a distributed database system. Some of the reasons for building a distributed database was data sharing, reliability, availability, and query processing speed. With these considerations, both government agencies and private sector became interested to use distributed systems to manage their job at the office. It is used as a reason to build an automated KGB system of Infokom Department in Province of Moluccas. Furthermore, there was no computerized system to handle this system before. Because of it was a critical or important system, then it was requires to build a system that has a fault tolerant capability.The system architecture was built by client server method using sockets as middleware in the process of network communicaton. The system method was used full replica, and used file replication using a group to ensure data consistency. The SQL Statement was sent by the client would be converted into an XML format which then would be sent to the server using a socket. Data redundancy model and process redundancy model managed by socket middleware.The results of this research was a middleware application using socket that handle the distribution of databases from client applications to database server that were implemented on a periodic system of automatic salary increases in the Office of Information and Communication in Province of Moluccas.  Keywords— Socket, distributed database, replication
DISTRIBUSI BASIS DATA KEPENDUDUKAN UNTUK OPTIMALISASI AKSES DATA: SUATU KAJIAN PUSTAKA Sutanta, Edhy; Ashari, Ahmad
Jurnal Ilmu Komputer Vol. 5, No. 1 April 2012
Publisher : Jurnal Ilmu Komputer

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Abstract

One of the problems now emerging and difficult to resolve related to the development of information systems in various institutions/agencies in Indonesia is the heterogeneity in the network, hardware, OS, programming language, developers, database, and the number of unique identification number that is used. E-KTP project that based on single identity number (SIN) are expected to be a significant improvement steps. Information system development of e-KTP equipped with a database that stores a database of population associated with the identity of every citizen aged over 17 years and/or married.Application of a distributed database on a database of population is an important and feasible given the centralized database has many shortcomings. This paper reveals an idea about the implementation scenarios citizen population distribution database that includes demographic scenario of a single national master database and centralized, population database development logic design, physical design database development on population, population distribution database, database replication and fragmentation, as well as the aspects of the DDBMS.
INTEGRASI LAPORAN DEMAM BERDARAH DENGUE (DBD) MENGGUNAKAN TEKNOLOGI WEB SERVICE Saputra, Ragil; Ashari, Ahmad
JURNAL MASYARAKAT INFORMATIKA Vol 2, No 3 (2011): Jurnal Masyarakat Informatika
Publisher : Jurusan Ilmu Komputer/Informatika UNDIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (415.82 KB) | DOI: 10.14710/jmasif.2.3.15-26

Abstract

Dengue Hemorrhagic Fever (DHF) is one of the infectious diseases that frequently leads to Extraordinary Situation. The management of report is conducted by Health Community Center which subsequently gives report to Health Office. A problem arising from the report management is the fact that the report is conducted manually, therefore, the data is less valid and is not processed as quickly as possible. The quick and accurate data report system enables to lessen the risk of Dengue Hemorrhagic Fever. Due to this fact, it is undeniable necessary to provide an integrated inter-system of Dengue Fever report. This system includes an inter-system between one Health Community Center to another and to the system in Health Office. The integration of inter-system report is able to be conducted by the use of web service technology. Therefore, this research focuses on the development of Web Service based integrated system on the report of Dengue Hemorrhagic Fever. Data exchange is conducted in XML form by the application of SOAP and WSDL technologies. Library NuSOAP is necessary to provide class soapClient and soapServer. In other words, it functions as the listener whose functions are to receive and to response at the access demand toward web service. The result is web service based report system which has dual functions since the system has functions to be either server or client.
Sistem Kontrol dan Monitoring Suhu Jarak Jauh Memanfaatkan Embedded system Mikroprosesor W5100 dan ATMega8535 Nurahmadi, Fauzan; Ashari, Ahmad
IJEIS - Indonesian Journal of Electronics and Instrumentation Systems Vol 1, No 2 (2011): IJEIS
Publisher : Indonesian Computer, Electronics, and Instrumentation Support Society (IndoCEISS)

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Abstrak            Penggunaan jaringan internet dewasa ini semakin cepat dan sudah masuk kepada hal-hal kebutuhan dasar manusia seperti komunikasi, monitoring, dan controlling. Tujuan dari perancangan sistem ini adalah agar dapat membantu mengetahui dan melakukan tindakan terhadap suatu suhu dalam sebuah ruangan dari tempat yang berbeda.            Sistem kontrol suhu jarak jauh memanfaatkan embedded system berbasis mikrokontroler W5100 merupakan sebuah rangkaian sistem yang terdiri dari banyak sistem mikrokontroler seperti AT8535 yang dilengkapi dengan sensor suhu, dan sistem actuator yang dapat memanipulasi suhu, serta sistem mikrokontroler W5100 yang akan menjadi jembatan antara user dengan sistem monitoring dan kontrol suhu, yang hasil nya akan di tampilkan secara periodic dalam sebuah aplikasi berbasis JAVA.            Berdasarkan hasil uji coba yang sudah dilakukan dengan menggunkan pengujian, yaitu membandingkan antara suhu yang ditampilkan pada aplikasi dengan suhu yang ada pada objek menunjukan tidak ada perbedaan yang signifikan. Demikian juga dengan mikrokontroler W5100 dapat digunakan dan berjalan dengan baik.Kata kunci— Suhu, Mikrokontroler, AT8535, W5100  Abstract             Today’s Internet network is getting faster and have entered on the things of basic human need such as communication, monitoring, and controlling. The purpose of this system design is to help find out and do something to the temperature in a room from distance.            Remote temperature control system utilizing microcontroller-bases embedded system w5100 is a circuit system consisting of many system such as the AT8535 microcontroller system that will be a bridge between user with system monitoring and temperature control, where its results will be displayed periodically in a JAVA-bases application.            Based on the result of trial that have been done by using the test, which compare the temperature shown on the application whit the existing temperature of the object showed no significant difference similarly, the w5100 microcontroller can be used and run well.Keywords— Temperature, Microcontroller, AT8535, W5100
Purwarupa kWh Meter Prabayar dengan Masukan Voucher Secara Remote Melalui Web Browser Dewanto, Puspo; Ashari, Ahmad
IJEIS - Indonesian Journal of Electronics and Instrumentation Systems Vol 2, No 2 (2012): IJEIS
Publisher : Indonesian Computer, Electronics, and Instrumentation Support Society (IndoCEISS)

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Abstract

AbstrakPengembangan teknologi smart home yang diimplementasi pada berbagai perangkat dirumah sudah banyak dilakukan. Pada penelitian ini dilakukan inovasi pengembangan sistem instrumentasi dan kendali energi listrik atau kWh meter dengan sistem prabayar. Sistem prabayar ini menggunakan voucher  yang digunakan sebagai masukan sistem kendali on/off pada aliran daya. Sistematika pemasukan voucher kedalam sistem menggunakan Ethernet yang terhubung dengan laptop. Kemudian informasi dari sistem tersebut dapat diakses melalui web browser. Sistem ini dirancang menggunakan Arduino UNO berbasis ATMega 328 sebagai kontroler, Arduino Ethernet Shield sebagai modul ethernet, sensor ACS712 30 A sebagai pendeteksi nilai arus, dan juga menggunakan sensor tegangan yang di buat dengan prinsip penyearah arus dan rangkaian pembagi tegangan. Mekanisme perhitungan penggunaan energi listriknya dilakukan akumulasi yang dihitung tiap detik, dan perhitungan ini akan digunakan untuk mengurangi nilai voucher yang ada. Sistem ini juga dilengkapi dengan alarm sebagai peringatan apabila voucher telah mencapai nilai ≤ 20 kWh. Purwarupa kWh meter prabayar ini berhasil dibuat dengan baik dan diketahui bahwa sensor arus pada sistem ini memiliki kesalahan pembacaan sebesar 2 ± 1 %, sensor tegangan sebesar  4  ± 2 %  dan kesalahan perhitungan kWh pada sistem ini sebesar  5 ± 1 %. Sistem ini juga berhasil melakukan penginputan voucher melalui ethernet dengan web browser. Kata Kunci : kWh meter prabayar, arduino, ethernet shield, web browser  Abstract Development of smart home technologies are implemented on a variety of home devices have been made. In this research has the objective to make an innovation to develop of instrumentation and control systems or meter energy prepaid system. The system uses a prepaid voucher that used as input for the on/off control system on the flow of power. Systematics for entering voucher into the system using ethernet that connected to the laptop. Then, the information from system can be shown and access via web browser . The system was designed using Arduino UNO based ATMega 328 as a controller, the Arduino ethernet shield as ethernet module, ACS712 30 A sensor as detection current value, and also use a voltage sensor that made with the principle of rectification and voltage divider circuit currents. The system is to import the vouchers into the system interface that can be accessed through a web browser. The mechanism of calculations the power consumption performed every second count accumulation, and this calculation will be used to reduce the value of existing vouchers. The system is also equipped with an alarm as a reminder when the voucher has reached a value of ≤ 20 kWh. Prototype of prepaid meter energy successfully created a well and it is known that the current sensor readout systems have errors  2 ± 1 %, the sensor voltage   4 ± 2 % and errors in the calculation of meter energy system  5 ± 1 %. The system also successfully inputting voucher via ethernet with web browser. Keywords : prepaid meter energy, arduino, ethernet shield, web browser.
Payload Attribution Using Winnowing Multi Hashing Method sembiring, Irwan; Istiyanto, Jazi Eko; Winarko, Edi; Ashari, Ahmad
International Journal of Information and Network Security (IJINS) Vol 2, No 5 (2013)
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.512 KB) | DOI: 10.11591/ijins.v2i5.3825

Abstract

Payload attribution is a process to identify the sources and destinations of all packets that appeared on a network and a certain excerpt of a payload. This method can be used for traffic efficiencies in investigating internet crime (cybercrime), such as tracing who is responsible for activities for unauthorized access, illegal contents, deliberate spread of the virus, data forgery and any cybercrime. The payload is the actual data that is sent by the packet to the destination. The aim using Winnowing Multi Hashing Method (WMH) is to extract the payload by calculating the value of false positive. A low false positive values ​​in theWMH will be recommended to the reference value of the block boundary or window hash. This method can be used as a solution for addressing the problems of storage media size required on the network forensic activity
Rancang Bangun Fault Tolerance pada Sistem Database untuk Aplikasi Point Of Sale Oei, Standy; Ashari, Ahmad
IJCCS - Indonesian Journal of Computing and Cybernetics Systems Vol 5, No 2 (2011): IJCCS
Publisher : Indonesian Computer, Electronics, and Instrumentation Support Society (IndoCEISS)

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Abstract

Abstract— A fault tolerant system is a system that has the ability to be able to continue its jobs properly although there is a fault in hardware or software of the system. A system that has a fault tolerant capability is usually critical or important system. For example is at Point Of Sale application. Point Of Sale Application has evolved from offline-based toward online-based. With an online-based, the existence of a central database server must be guaranteed free from failure.To get a central database server that is free from failure is impossible. Something that can be cultivated is to create a system that can tolerate a failure in the central database server. This is done with the help of a second central database server (slave), which is useful as a replication of the central database server (master). To ensure data from these two central database servers are the same, then used the concept of reading and writing "read one/write all". And to manage all the processes needed in implementing a fault tolerant application, we need the help from a coordinator.The result obtained in this research is a design of fault tolerant architecture that can be applied to various types of information system applications include Point Of Sale application. By using this fault tolerant architecture that has been built, Point Of Sale application can still run the transaction process even if there is a failure in accessing data in one central database server (master/slave). Keywords— fault tolerance, database system, point of sale application
WEB Services Implementation on The Report of Dengue Hemorrhagic Fever (DHF) At Health Office Karanganyar Saputra, Ragil; Ashari, Ahmad
IJCCS - Indonesian Journal of Computing and Cybernetics Systems Vol 5, No 1 (2011): IJCCS
Publisher : Indonesian Computer, Electronics, and Instrumentation Support Society (IndoCEISS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB)

Abstract

Abstract— Dengue Hemorrhagic Fever (DHF) is one of the infectious diseases that frequently leads to Extraordinary Situation. The management of report is conducted by Health Community Center which subsequently gives report to Health Office. A problem arising from the report management is the fact that the report is conducted manually, therefore, the data is less valid and is not processed as quickly as possible. The quick and accurate data report system enables to lessen the risk of Dengue Hemorrhagic Fever. Due to this fact, it is undeniable necessary to provide an integrated inter-system of Dengue Fever report. This system includes an inter-system between one Health Community Center to another and to the system in Health Office. The integration of inter-system report is able to be conducted by the use of web service technology. Therefore, this research focuses on the development of Web Service based integrated system on the report of Dengue Fever. Data exchange is conducted in XML form by the application of SOAP and WSDL technologies. Library NuSOAP is necessary to provide class soapClient and soapServer. In other words, it functions as the listener whose functions are to receive and to respond at the access demand toward web service. The result is web service based report system which has dual functions since the system has functions to be either server or client.Keywords— web service, integration, SOAP, DHF.
Rancang Bangun Keamanan Web Service Dengan Metode Ws-Security Muzakir, Ari; Ashari, Ahmad
IJCCS - Indonesian Journal of Computing and Cybernetics Systems Vol 6, No 1 (2012): IJCCS
Publisher : Indonesian Computer, Electronics, and Instrumentation Support Society (IndoCEISS)

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Abstract

AbstrakWeb service menggunakan teknologi XML dalam melakukan pertukaran data. Umumnya penggunaan web service terjadi pertukaran data ataupun informasi penting yang perlu dijaga keamanannya. Bentuk pengamanan yang diterapkan pada web services adalah dengan penggunaan teknik kriptografi kunci-publik. Adapun serangan dapat berupa pengintaian, perusakan maupun pencurian data. Salah satu cara penyelesaian terbaik adalah dengan membuat data tersebut tidak dapat dibaca orang lain. Implementasi yang telah dilakukan dengan menggunakan library keamanan akan memberikan kemudahan dalam membangun keamanan web service karena dengan dukungan library XMLSEC sebagai library pendukung dan library class_wss yang telah dibangun mampu mengatasi masalah keamanan pada jalur transport khususnya untuk otentikasi, otorisasi, dan konfidensialitas pesan SOAP request. Model WS-Security dengan menggunakan XML Signature, XML Encryption, serta Security Token yang memanfaatkan algoritma kriptografi RSA dengan panjang kunci 1024 bit mampu memberikan perlindungan terhadap transmisi data antara client dan server web service. Pengujian yang dilakukan pada web service dengan menerapkan model library class_wss sebagai keamanan web service yang dibangun memberikan hasil yang baik, yaitu pesan SOAP request terenkripsi dan mampu didekripsi dengan baik serta dapat tertandatangani dan dicek keasliannya.Kata kunci— Keamanan Web Service, XML Signature, XML  Encryption, Security Token. Abstract Web service uses XML technology to exchange data in. Generally, the use of the web service exchanges data or important information that needs to be guarded security. Form of security is applied to web services is to use public-key cryptography techniques. The attack can be a reconnaissance, destruction or theft of data. One way the best solution is to create data that can not read anyone else, even if someone else managed to retrieve the data, he will not be able to read it.            The implementation was done by using the security library will provide facilities in developing a web security service for the library support XMLSEC as library supporters and library class_wss that have been built able to overcome the problem of security on the transport path, especially for authentication, authorization, and confidentiality request SOAP message. Model WS-Security using XML Signature, XML Encryption, and Security Token which utilizes the cryptographic algorithm RSA with 1024 bit key length to provide protection against transmission of data between client and server web service. Tests performed on the web service by implementing a security model class_wss library web service that is built to give good results, the SOAP request message is encrypted and decrypted with a good and able to sign and check their authenticity too.Keywords— Web Service Security, XML Signature, XML Encryption, Security Token
DESAIN MODEL SPESIFIKASI AKSES PENGGUNA DI LINGKUNGAN JARINGAN BERKECEPATAN RENDAH Wardani, Ratna; Soesianto, F; Nugroho, Lukito Edi; Ashari, Ahmad
Jurnal Informatika Vol 4, No 1: January 2010
Publisher : Universitas Ahmad Dahlan

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Abstract

The Internet has the potential to provide universal and easy access to the various types of information services on a single multi-service, but unreliable quality connection can sometime prevent access to the Internet altogether. There are many efforts have been started to resolve the Internet access problem. The main idea behind them is to provide a set of objective parameters that can be used to compare and negotiate in a network. Relatively little emphasis has been put on issues concerning end users, especially on the relationship of user perception and Quality of Service parameters.  In order to implement Quality of Service schemes successfully, users must be taken into account to establish users´ subjective perceptions of Quality of Service.This paper is concerned to the study of mechanism of providing Quality of Service specification for Internet access in low-quality connection. We propose the conceptual model for the specification of user access and allow the users to specify their subjective preferences through the Quality of Service parameters. This model provides the alternative option for user access if resource availability in the system is limited. The user is given opportunity to define their access and determine the parameter for each application which they are chosen. The system will check the resource availability and then compare to the user preferences. In the case resource availability is lower than user preferences, the system can exchange to another option as determined by user requirements.