Sökning: "VoIP"

Visar resultat 1 - 5 av 14 avhandlingar innehållade ordet VoIP.

1. 1. Unwanted Traffic and Information Disclosure in VoIP Networks : Threats and Countermeasures

   Författare :Ge Zhang; Simone Fischer-Huebner; Costas Lambrinoudakis; Karlstads universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SIP; VoIP; security; Denial of Service; Vulnerability analysis; timing attacks; Spam; DTMF; SIP; RTP; Computer Science; Datavetenskap;

   Sammanfattning : The success of the Internet has brought significant changes to the telecommunication industry. One of the remarkable outcomes of this evolution is Voice over IP (VoIP), which enables realtime voice communications over packet switched networks for a lower cost than traditional public switched telephone networks (PSTN). LÄS MER

3. 2. Towards Secure SIP Signalling Service for VoIP applications : Performance-related Attacks and Preventions

   Författare :Ge Zhang; Simone Fischer-Hübner; Costas Lambrinoudakis; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SIP; VoIP; Security; Computer science; Datavetenskap; Datavetenskap; Computer Science;

   Sammanfattning : Current Voice over IP (VoIP) services are regarded less secure than the traditional public switched telephone network (PSTN). This is due to the fact that VoIP services are frequently deployed in an relatively open environment so that VoIP infrastructures can be easily accessed by potential attackers. LÄS MER

4. 3. Anypath Routing for Reducing Latency in Multi-Channel Wireless Mesh Networks

   Författare :Andreas Lavén; Anna Brunstrom; Andreas Kassler; Björn Landfeldt; Karlstads universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wireless Mesh Networks; Anypath Routing; Forwarding; VoIP; Computer Science; Datavetenskap;

   Sammanfattning : Increasing capacity in wireless mesh networks can be achieved by using multiple channels and radios. By using different channels, two nodes can send packets at the same time without interfering with each other. To utilize diversity of available frequency, a channel assignment scheme is required. LÄS MER

5. 4. How to Regulate Information and Communications Technology? : A Jurisprudential Inquiry into Legislative and Regulatory Techniques

   Författare :Ubena John; Peter Wahlgren; David Fisher; Helen Xanthaki; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Legislative techniques; New Regulatory Culture; VoIP; digital copyright; DRM; P2P; net neutrality; Rule of Law; fundamental rights; innovation; legislation; precedents; convergence; applications; goods; services; telecommunications; ICT regulation; Law and Information Technology; rättsinformatik;

   Sammanfattning : ICT transformations digitalisation, computerisation and distributed networks have enabled emergence of new goods, services and applications that have changed the way behaviours are conducted. Moreover, ICT goods have been transformed into services, blurring established legal categories. LÄS MER

7. 5. Quality aspects of internet telephony

   Författare :Ian Marsh; Karlsson Gunnar; Henning Schulzrinne; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Telecommunication; Telekommunikation; VoIP;

   Sammanfattning : Internet telephony has had a tremendous impact on how people communicate.Many now maintain contact using some form of Internet telephony.Therefore the motivation for this work has been to address the quality aspectsof real-world Internet telephony for both fixed and wireless telecommunication. LÄS MER