A research on the impact of encryption algorithms on the quality of VPN tunnels’ transmission

Abstract

The following article presents the results on the impact of encryption algorithms and the cryptographic hash function on the QoS (Quality of Service) transmission in a computer network. A network model supporting data encryption using the AES algorithm and the MD5 and SHA hash functions used in VPN tunnels was designed and tested. The influence of different data length on the quality of transmission in a secured network was studied. The measurements and tests of networks were performed according to two methodologies ITU-T Y.1564 and RFC 2544. The impact of the data encryption mechanism on bandwidth, data loss and maximum delays was examined. The secured network tests were performed with different combinations of encryption algorithms and hash functions of the VPN tunnel in the ESP (Encapsulating Security Payload) transport mode.

Timed Petri Nets for Modeling and Performance Evaluation of a Priority Queueing System

“…The requirements are, first and foremost, reliability that takes into account the complexity and interdependence of the system. On the other hand, however, the stochastic characteristics and complexity of systems carry risks related to the requirements of reliability control [1], transmission quality [2], availability, and security [3]. In research work on electronic communication systems and devices, queueing models in which events flow into queues in a Markovian or non-Markovian manner are often used.…”

International Journal of Electronics and Telecommunications

“…QoS transmission and security mechanisms are among the most important challenges arising during the design and maintenance of modern computer networks and NG (Next-Genaration) networks [1], [2]. Guaranteeing adequate quality of service is of particular importance for real-time applications, such as data transmission in VoIP networks [3], [4]. These D. Strzęciwilk is with Institute of Information Technology, University of Life Sciences, Warsaw, Poland (e-mail: dariusz_strzeciwilk@sggw.pl).…”