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All Journal Social, Humanities, and Educational Studies (SHEs): Conference Series Respati
Nofiyanto, Nofiyanto
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Computer Science & IT Education Engineering Languange, Linguistic, Communication & Media Social Sciences

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SHORT MESSAGE ENCRYPTION APPLICATION DEVELOPMENT USING VIGENERE ALGORITHM UTILIZING EULER'S NUMBER ON ANDROID SMARTPHONE Nofiyanto, Nofiyanto; Hamzah, Hamzah; Surbakti, Herison
Jurnal Teknologi Informasi RESPATI Vol 9, No 27 (2014)
Publisher : Universitas Respati Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35842/jtir.v9i27.85

Abstract

SMS (Short Message Service) is a facility for sending and receiving a short message of text by using a cell phone. SMS is a medium of communication that is easy to use and relatively cheap for SMS costs. Messages sent via SMS does not guarantee the security and confidential because messages that are sent using the default SMS application for your mobile phone is still an open text that has not been protected. Therefore, it takes a method and applications to secure the confidentiality of the information in an SMS message.This research aims to develop short message encryption applications on android smartphones using Vigenere algorithm utilizing euler's number as a safety and maintaining the confidentiality of this SMS only to a functioning android smartphone users to send messages and message encryption as well as receive incoming messages and decrypt the message. Starting from the early stages of identifying, needs analysis, design, implementation and testing.Application of message encryption using vigenere algorithm utilizing euler's number digit can help users of android smartphone to secure the contents of the message are confidential.  Keywords: Short Message Service, the number of euler, vigenere algorithm
Efforts to Improve IPS Concept Understanding Through Discovery Learning Model Assisted by Visual Audio Learning Media in Basic School Students Nofiyanto, Nofiyanto
Social, Humanities, and Educational Studies (SHEs): Conference Series Vol 3, No 3 (2020): Social, Humanities, and Educational Studies (SHEs): Conference Series
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.744 KB) | DOI: 10.20961/shes.v3i3.46071

Abstract

The problem in this research is how the application of discovery learning model assisted by audio-visual media can improve understanding of social studies concepts in elementary school students? Purpose To determine the application of discovery learning model assisted by audio-visual media can improve understanding of social studies concepts in elementary school students. The object of this research is the fourth grade students of SD UMP. The data collection technique is carried out systematically with standard procedures, namely, learning outcome data is taken through tests at the end of each cycle and observation of student participation. The data were analyzed using quantitative and qualitative analysis of the formative test results. Then, the results of the calculations were consulted with the success criteria, to determine whether they were complete or not. Based on the results of the evaluation test from the first and second cycles, an increase in learning completeness was obtained. In the first cycle achieving learning outcomes with completeness 68%. In the second cycle the completeness of learning outcomes was 82%. Based on the findings and the results obtained in the study, it can be concluded that, through the discovery learning model assisted by audio-visual media, it can improve understanding of the social studies concept in elementary school students, but it still needs to be improved in cycle III.
Co-Authors Hamzah Hamzah Surbakti, Herison