Browsing by Author "Priyatna, Bayu"

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    ANDROID DATA SECURITY USING CRYPTOGRAPHIC ALGORITHM COMBINATIONS
    (International Journal of Psychosocial Rehabilitation, Vol. 24, Issue 1, 2020) Hananto, April Lia; Priyatna, Bayu; Rosita, Ai
    Android is a platform that is very vulnerable to hacked by bad people to steal users' data intentionally or unintentionally [1]. To deal with data disturbances it is necessary to use cryptography [2], one of which is Playfair Chipper. Playfair's cryptographic algorithms are currently being developed with various types of matrix table modifications, ranging from changes in matrix size, or changes in the encryption process steps. The results of applying the Playfair combination and modification algorithm with the Linear Feedback Ship Register (LFSR) for securing data on the Android platform. Testing the application of the results of the Playfair algorithm modification using the Avalanche Effect can be concluded that the resulting ciphertext has a high complexity.
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    ZFONE SECURITY ANALYSIS OF VIDEO CALL SERVICE USING GENERAL NEWORK DESIGN PROCESS METHOD(GNDP)
    (International Journal of Psychosocial Rehabilitation, Vol. 24, Issue 1, 2020) Priyatna, Bayu; Hananto, April Lia; Istambul, M. Rozahi
    VoIP (Voice over Internet Protocol) is one of the services implemented in wireless local area networks. However, VoIP that uses wireless technology as a media data stream Video Call service has a high risk of being tapped by sniffing attacks [2]. To avoid this from happening, you can add a security system to the service, one of which is to use Zfone security. Adding a security system will affect the work of the Video Call service on the quality of service. The author uses the General Network Design Process (GNDP) study method. After testing security by cropping images, Zfone affects the security of video calls on WLAN by turning conversations between client images black. Although Zfone managed to secure from eavesdropping on video calls, Zfone also had an impact on the deterioration of the quality of the Video Call service.