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Media security in open IMS

Gelder, A.S. van (2009) Media security in open IMS. Master's Thesis / Essay, Computing Science.

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Mobile networks have evolved enormously over the last past decades and nowadays convergence with fixed networks is quite normal. However, traditional GSM networks are not suited best for the transfer of IP traffic, since technical limitations prohibit high bandwidth connections. Therefore the 3GPP developed a mobile system based on evolved GSM core networks and the radio access technologies that they support. Examples of such systems are GPRS, EDGE and UMTS. Currently they are working on the specifications of the fourth generation of mobile networks, which is based on the IP Multimedia Subsystem (IMS). IMS is an access independent framework, which is capable of delivering media services to (mobile) users. An example application is a Voice over IP connection between two connected devices, for example two smartphones. However, other media related services may be offered as well. Since previous mobile networks had its own security mechanisms and because IMS is an evolvement of these networks, the IMS specification initially did not offer media security. Due to the growing convergence of fixed and mobile networks over the last few years the specification has already changed over time and IMS has become access network independent, which led to the term Common IMS. Because of this access network independency property, media security became a real issue, since not every access network has a security mechanism build in, e.g. cable networks. Therefore the 3GPP is looking for a solution and has already done several proposals. This thesis discusses which of the proposed solutions matches the stated 3GPP requirements best and looks how the architecture of IMS is impacted by the implementation of those solutions.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Computing Science
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:28
Last Modified: 15 Feb 2018 07:28

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