Wijaya Kurniawan
University of Brawijaya

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search
Journal : TELKOMNIKA (Telecommunication Computing Electronics and Control)

One-Time Password Implementation on Lego Mindstorms NXT Barlian Henryranu P; Heru Nurwarsito; Wijaya Kurniawan
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 12, No 3: September 2014
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v12i3.92

Abstract

One of the factors that affect the security of a network or system is user authentication and unfortunately at times it can be said not safe anymore. Brute force attacks on password systems are dominant (static) potential to penetrate network security or user authentication system. One way to overcome these drawbacks is to use the One Time Password (OTP) algorithm. OTP is a password security system using dynamic passwords. The password will be valid only for a session only, and so want to get into the next session, the password will be changed to the sequence/combination in accordance with certain rules or randomly determined by the user. In this research, author will be analyzed how the reliability of the OTP algorithm by applying it to a LEGO Mindstorm robot. The robot will be designed into a system where the user will be safe to enter the default password then the system will change the password every session. The results of the questionnaire showed that 81% users feel more secure, but more 60% said difficult to do because the user must perform the calculations in advance to enter the password.
WSN performance based on node placement by genetic algorithm at smart home environment Mochammad Hannats Hanafi Ichsan; Wijaya Kurniawan; Gembong Edhi Setyawan; Irma Asri Kartika Sandy
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 17, No 1: February 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v17i1.11621

Abstract

Wireless sensor connectivity is one of several factors that determines the communication reliability of each node. The placement of the node depends on the area that covered by wireless coverage area, so the node placement should be optimally placed. But the other aspect is the sensor coverage area. Sensor coverage area sometimes could be different with wireless sensor coverage area. Based on that situation, it needs to optimize that situation. Genetic Algorithm is an algorithm that utilizes a heuristic approach that uses biological mechanism evolution. It used to evolution the best position of Sensor Node based on Wireless and Sensor coverage area. After the position of each node generated by Genetic Algorithm, it still needs to evaluate the wireless sensor node performance. The performance indicates that the genetic algorithm can be used to determine sensor node placement in the smart home environment. The smart home environment used to monitor event at the house such as wildfire. In this research used Quality of Services (QoS) to measure wireless sensor performance. The experimental testing scenario will be used to place several nodes that generated. The QoS performed systems reliability that produced based on 3, 4 and 5 testing nodes, the minimum and maximum of each: delay is 6.21 and 8.74 milliseconds, jitter is 0.11 and 1.59 Hz and throughput is 68.83 and 90.49 bps. Based on ETSI classification, the performance of sensor node placement is Good and acceptable in real-time systems.