Sökning: "Voice over IP"

Visar resultat 1 - 5 av 91 uppsatser innehållade orden Voice over IP.

1. 1. SIPman : A penetration testing methodology for SIP and RTP

   Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för datavetenskap

   Författare :Elin Wallgren; Christoffer Willander; [2022]
   Nyckelord :Session Initiation Protocol; Real-time Transport Protocol; penetration testing; methodology; Voice over IP; Session Initiation Protocol; Real-time Transport Protocol; penetrationstestning; metod; Voice over IP;

   Sammanfattning : Background. SIP and RTP are two protocols that are widely used, and they play an important role in VoIP services. VoIP is an integral part of many communication services, e.g. LÄS MER

3. 2. Evaluation of the Perceived Speech Quality for G729D and Opus : With Different Network Scenarios and an Implemented VoIP Application

   Master-uppsats, Linköpings universitet/Informationskodning

   Författare :Louise Almér; [2022]
   Nyckelord :Compression; Codec; audio; speech quality; quality of experience;

   Sammanfattning : Communication has always been a vital part of our society, and day-to-day communication is increasingly becoming more digital. VoIP (voice over IP) is used for real-time communication, and to be able to send the information over the internet must the speech be compressed to lower the number of bits needed for transmission. LÄS MER

4. 3. Homomorphic Encryption for Audio Conferencing

   Master-uppsats, Linköpings universitet/Institutionen för datavetenskap

   Författare :Herman Nordin; Ebba Lindström; [2022]
   Nyckelord :Homomorphic encryption; VoIP; security; audio conferencing; cryptography;

   Sammanfattning : Homomorphic encryption (HE) enables computations on encrypted data making it possible to perform calculations on a server without sharing the secret key for decryption. HE is relatively new and has seen significant improvements in recent years in terms of speed of encryption, decryption, operations, and the number of operations possible to perform in a row without damaging the ciphertext. LÄS MER

5. 4. Analyzing VoIP connectivity and performance issues

   Kandidat-uppsats,

   Författare :Mehenni Sadaoui; [2019]
   Nyckelord :VoIP; connectivity and performance issues; call quality; packet traces.;

   Sammanfattning : The appearance of Voice over IP (VoIP) revolutionized the telecommunications word, this technology delivers voice communications over the internet protocol (IP) networks instead of the public switched telephone network (PSTN), calls can be made between two VoIP phones as well as between a VoIP phone and an analog phone connected to a VoIP adapter [1]. The use of this technology gives access to more communication options compared to the conventional telephony but the users face different problems, mostly connectivity and performance issues related to different factors such as latency and jitter [2], these factors affect directly the call quality and can result in choppy voice, echoes, or even in a call failure. LÄS MER

7. 5. Detecting SQL Injection Attacks in VoIP using Real-time Deep Packet Inspection : Can a Deep Packet Inspection Firewall Detect SQL Injection Attacks on SIP Traffic with Reasonable Performance?

   Master-uppsats, Linköpings universitet/Institutionen för datavetenskap

   Författare :Linus Sjöström; [2019]
   Nyckelord :DPI SQL;

   Sammanfattning : The use of the Internet has increased over the years, and it is now an integral part of our daily activities, as we often use it for everything from interacting on social media to watching videos online. Phone calls nowadays tend to use Voice over IP (VoIP), rather than the traditional phone networks. LÄS MER