@mastersthesis{lurchi-2017,
  title = {Improving Voice over GNUnet}, 
  author = {Christian Ulrich}, 
  school = {TU Berlin}, 
  volume = {Bachelor}, 
  year = {2017}, 
  month = {July}, 
  address = {Berlin}, 
  pages = {0--48}, 
  type = {B.S}, 
  abstract = {In contrast to ubiquitous cloud-based solutions the telephony application
        GNUnet conversation provides fully-decentralized, secure voice communication and
        thus impedes mass surveillance. The aim of this thesis is to investigate why
        GNUnet conversation currently provides poor Quality of Experience under typical
        wide area network conditions and to propose optimization measures. After network
        shaping and the initialization of two isolated GNUnet peers had been automated,
        delay measurements were done. With emulated network characteristics network
        delay, cryptography delays and audio codec delays were measured and transmitted
        speech was recorded. An analysis of the measurement results and a subjective
        assessment of the speech recordings revealed that extreme outliers occur in most
        scenarios and impair QoE. Moreover it was shown that GNUnet conversation
        introduces a large delay that confines the environment in which good QoE is
        possible. In the measurement environment at least 23 ms always ocurred of which
        large parts are were caused by cryptography. It was shown that optimization in
        the cryptography part and other components are possible. Finally the conditions
        for currently reaching good QoE were determined and ideas for further
        investigations were presented}, 
  www_section = {CADET, GNUnet, measurement, performance}, 
  www_tags = {selected}, 
  url = {https://bibliography.gnunet.org}, 
  www_pdf_url = {https://git.gnunet.org/bibliography.git/plain/docs/lurchi-bs-thesis.pdf}, 
}