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Pemodelan Lingkungan Virtual untuk Interaksi Avatar Berbasis Context Pada Proyek Digital Life at Campus (DiL@C)

Jurnal Buana Informatika Vol 3, No 2 (2012): Jurnal Buana Informatika Volume 3 Nomor 2 Juli 2012
Publisher : Universitas Atma Jaya Yogyakarta

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Abstract

Abstract. Campus activities that use information technology increasing rapidly, these activities e.g. studying activity, access to information and so on. The increased activities forces instance has an "assistants" who can help the real user to complete their works and responsibilities. Virtual world allows the user to be in a different context so that it can follow a different activity at one time. Avatar requires a virtual Environment for the activity. This research build a model in virtual world (VES) that would bring together between avatars, virtual objects and context to work in a scenario in Digital Life at Campus (Dil@C). Design written in this paper to formulate a model of Context based communication, system architecture and implementation that can be applied in the virtual world.Keywords: DiL@C, avatar, context, Virtual Environment System (VES). Abstrak. Aktifitas kampus yang memanfaatkan teknologi informasi semakin banyak, Aktifitas ini contohnya perkuliahan, akses informasi dan lain-lain. Peningkatan aktifitas ini memaksa instance di dalam kampus memiliki ”asisten” yang dapat membantu real user untuk menyelesaikan pekerjaan dan tanggung jawabnya. Dunia virtual memungkinkan user dapat berada pada konteks yang berbeda sehingga dapat mengikuti aktifitas yang berbeda pada satu waktu. Pengembangan model avatar yang merepresentasikan user dalam dunia maya membutuhkan lingkungan virtual untuk beraktifitas. Penelitian ini memodelkan sebuah dunia virtual (VES) yang dapat mempertemukan antara avatar, obyek-obyek virtual dan konteks untuk bekerja dalam sebuah skenario dalam Digital Life at Campus (DiL@C). Perancangan yang ditulis dalam paper ini merumuskan model komunikasi berbasis konteks, arsitektur sistem dan implementasi yang bisa diterapkan dalam dunia virtual.Kata Kunci: DiL@C, avatar, konteks, Virtual Environment System (VES).

Uniform Resource Locator (URL) Detection Security System Based on Android

Compiler Vol 8, No 1 (2019): Mei [Accredited as S5 with number 21 /E /KPT /2018]
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

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Abstract

The use of the internet, which is currently increasing dramatically, certainly brings the convenience of finding information. The increase in internet usage also eventually gave rise to cybercrime crimes, one of which was by spreading a URL or fake site to steal someone's personal data. The research done is how to build an Android-based application that can detect the security of a URL. The goal is that internet users, especially social media, can avoid cybercrime crime that wants to steal personal data. Making an application uses the Regular Expression method to analyze each line of the Webpage Source Code in the URL based on 8 criteria taken from the World Wide Web Consortium (W3C). The application was then tested with 10 phishing-charged URLs and compared with Kaspersky, McAfee, and AdBlock applications. Based on the results of trials and comparisons, applications that have been made are able to detect 6 or 60% of the 10 URLs. Kaspersky and McAfee applications can detect 70%, while AdBlock only detects 3 or 30% of 10 URLs that contain phishing.

MEMBANGUN SISTEM KEAMANAN ARP SPOOFING MEMANFAATKAN ARPWATCH DAN ADDONS FIREFOX

Compiler Vol 4, No 1 (2015): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

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Abstract

The Development of information Technology, especially computer networks and the service in a rejuvenate the human side. The development of the internet is very widespread. The security level digital data becomes vulnerable to attack by the attacker. Arp spoofing is one of the attacks in a network that can be used to view digital data traffic such as emails, passwords and etc, when is running in the network. The process of prevention againtst arp spoofing attacks, made an application to detect and block the attacker in the network by Firefox Addons. Attacker will be directly blocking (drop) into to Mikrotik OS. Users avoid the attack arp spoofing. The results of testing one, two and three can be detect and block the presentation of the results of 83%, so That’s the terms of security in the network can be safe from attack to the attacker.

PEMBANGKITAN WARNA ANGKA TOKEK DENGAN METODE LINIER CONGRUEN METHOD (LCM)

Compiler Vol 5, No 1 (2016): Mei [Accredited as S5 with number 21 / E / KPT / 2018]
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

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Abstract

Color blindness is an abnormality in terms of seeing certain colors that occur as a result of demage to come cells (cone cells) in the retina of the eye, so that people with color blindness can be hard  to catch a certaincolor spectrum. People suffering from color blindness would have difficulty distinguishing certain shades can not even see certain colors. Developed by Dr. Ishihara test Shinobu Ishihara in 1917, until now the Ishihara test methods still be one of the main option in almost all countries to identify someone who had color blindess. In the figure gecko color generation system with linear method congruen method (lcm) described the components of software and hardwer that is required in the manufacture of  color generator application numbers congruen gecko with a linear congruen method (lcm). The determination of the initial value of the constant linear congruen method (lcm) into the determination of the color composition result generated randomly. System testing and completion of a questionnaire completed by Guttman and Likert scale. Diman on functional testing system results obtained with Guttman scale 100% yes that users can guess the number that appears on the color generation process. And the interface testing diselesaika with Likert scale with 85% strongly agree result the system has a 94% look attractive and easy to use system.

PERANCANGAN KEAMANAN SISTEM MENGGUNAKAN ALGORITMA HONEYPOT PADA APLIKASI KRS ONLINE (STUDI KASUS : SEKOLAH TINGGI TEKNOLOGI ADISUTJIPTO)

Compiler Vol 2, No 2 (2013): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

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Abstract

Many colleges already apply web based academic information system use internet connection, so it is need a system security to protect from attacks such as SQL Injection and Brute Force. Honeypot is a system security which devide two system that are original and fake system. Original system used by user to access academic information system that source from correct database. While fake system used to separate hacker and user. Hackers who try to enter with SQL Injection is send to fake system directly which has wrong data. This fake system seems correct and all action that was happened in will be noted on log history. When hacker try some password ese Brute Force, system will reset user password automatically. This system already test with 79 times SQL Injection and 29 times Brute Force attack. All attacks can handle nicely with honeypot algorithm.

PERANCANGAN ALGORITMA ANGGI (AA) DENGAN MEMANFAATKAN DIFFIE-HELLMAN DAN RONALD RIVEST (RC4) UNTUK MEMBANGUN SISTEM KEAMANAN BERBASIS PORT KNOCKING

Compiler Vol 2, No 2 (2013): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

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Abstract

In managing a server, an administrator takes a variety of ways for ensuring the safety and cosiness of the system. One type of threat that attack on the server is done on a port that is in an open state, thus making people who do not have access rights to perform port scanning to infiltrate into the server. One solution to cope with the attack on the port can be done by using port knocking. Port knocking is a method that can be applied to the server with the workings of such a code to unlock the safe. Port knocking is done by inserting a predetermined port sequenced to open a specific port. At the port sequenced delivery process takes an additional authentication likes keyport. Anggi algorithm (AA) is an algorithm that is built by combination o f Diffie-Hellman and RC4. The algorithm is used for encryption and descriptions a keyport from client side to the server side. In the process of sending a keyport to be modified by using the arithmetic calculation. Process of encryption and description keyport is done to prevent some attacks on the server by hackers with extracting such information after successfully breaking into a port. The results o f implementation AA algorithm on the process of port knocking can secure the delivery process o f keyport and improve the security o f server.

ANALISIS KUALITAS PERBAIKAN CITRA MENGGUNAKAN METODE MEDIAN FILTER DENGAN PENYELEKSIAN NILAI PIXEL

Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 10, No 1 (2018): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto

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Abstract

Metode Median Filter adalah salah satu metode perbaikan kualitas citra pada domain spatial. Domain spatial memiliki kelebihan pada hasil perbaikan karena perbaikan citra dilakukan per-pixel. Karena perbaikan citra dilakukan terhadap pixel, metode Median Filter memiliki komputasi yang tinggi dan waktu eksekusi yang lama.Dengan melakukan penyeleksian terhadap pixel yang perlu diperbaiki dapat mengurangi waktu proses perbaikan dan meningkatkan kualitas citra karena pixel yang sudah benar, tidak perlu diperbaiki. Pengukuran kualitas citra dilakukan menggunakan Peak Signal to Noise Ratio (PSNR) dengan membandingkan nilai citra asli dengan citra hasil perbaikan. Nilai PSNR ideal untuk disebut sebagai citra yang baik adalah 30dB.Kualitas Citra metode Median Filter dengan penyeleksian memiliki kenaikan nilai PSNR sebesar 5.6% dan memiliki kenaikan kecepatan waktu proses perbaikan kualitas citra sebesar 8.3% dibanding merubah semua nilai pixel citra

PERANCANGAN DAN PENERAPAN ALGORITMA RIZKI TANJUNG 24 (RTG24) UNTUK KOMPARASI KATA PADA FILE TEXT

Compiler Vol 3, No 1 (2014): Mei
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

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Abstract

Plagiarism is the act of taking essay or work of others, and recognize it as his own work. Plagiarism of the text is very common and difficult to avoid. Therefore, many created a system that can assist in plagiarism detection text document. To make the detection of plagiarism of text documents at its core is to perform string matching. This makes the emergence of the idea to build an algorithm that will be implemented in RTG24 Comparison file.txt applications. Document to be compared must be a file. Txt or plaintext, and every word contained in the document must be in the dictionary of Indonesian. RTG24 algorithm works by determining the number of same or similar words in any text between the two documents. In the process RTG24 algorithm has several stages: parsing, filtering, stemming and comparison. Parsing stage is the stage where every sentence in the document will be broken down into basic words, filtering step is cleaning the particles are not important. The next stage, stemming is the stage where every word searchable basic word or root word, this is done to simplify and facilitate comparison between the two documents. Right after through the process of parsing, filtering, and stemming, then the document should be inserted into the array for the comparison or the comparison between the two documents. So it can be determined the percentage of similarity between the two documents.

PENERAPAN HIDS (HOST INTRUSION DETECTION SYSTEM) DALAM MEMBANGUN KONFIGURASI FIREWALL SECARA DINAMIK

Compiler Vol 2, No 2 (2013): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

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Abstract

Development o f information technology and computer networks in particular its services on the one hand facilitate the work of human beings, but as the very widespread use of the internet, the security level of digital data has become more vulnerable to exploitation. The problem arises when the attacks happened on a computer network in a relatively fast, so that an administrator must always keep an eye on the computer network security. Limitations o f an administrator is exactly what underlies thecreation o f a system capable o f detecting and prevention of these attacks, so the time efficiency can be actually implemented. The system is built to prevent attacks on computer networks such as port scanning, ftp, ssh and telnet brute force. This system will analyze the number o f errors that occur on login these services, and makes a decision system if the login error exceeds the tolerance of an administrator. I f the number o f errors exceeds the tolerance, it will automatically create the firewall rules in a very short duration is one minute, so the system is able to prevent the attacks which happened in a very quick time.

PEMANFAATAN INTRUSION DETECTION SYSTEM (IDS) SEBAGAI OTOMATISASI KONFIGURASI FIREWALL BERBASIS WEB SERVICE MENGGUNAKAN ARSITEKTUR REPRESENTATIONAL STATE TRANSFER (REST)

Compiler Vol 2, No 2 (2013): November
Publisher : Sekolah Tinggi Teknologi Adisutjipto Yogyakarta

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Abstract

Many things can destabilize a computer network connections, both with regard to hardware and software. Therefore, we need a technique for network security, one of them is firewall. The problems that arise in this final project is to build a linux based firewall automation application via web service by using REST (Representational State Transfer) architecture and IDS (Intrusion Detection System). The system buid firewall rules using linux operating system with the help o f 2 pieces o f IDS to detect theactivities of traffic data between the intruder and the server that will be recorded in the IDS database. The system will compare the server with IDS on the router to get the IP address o f the actual intruders, so it will be blocked by the firewall. The applications is used to prevents the ping o f death attack usingweb service and REST protocol so that firewall rules will run automatically.