[26 May 2014] A bachelor student at RTSLAB was awarded the best thesis
award from IDA - Simon Andersson. more ...
[31 May 2012] A masters student at RTSLAB was awarded the best thesis
award from IDA - Ulf Magnusson. more ...
[27 February 2008] A masters student at RTSLAB was awarded the best thesis
award from IDA - Johan Sigholm. more ...
[03 March 2004] A masters student at RTSLAB was awarded the best thesis
award from IDA - Tobias Chyssler. more ...
[01 Jul 2003] For second year in a row a masters student at RTSLAB was awarded the best thesis
award from SNART - Mehdi Amirijoo. more ...
Master Thesis - Past Projects - Abstract
Live network acquisition in a public access scenario
This thesis investigates and implements a system that acquires connection
information from UDP and TCP connections. The acquired information is
transferred to a backend server for preservation.
The purpose of collecting this information is to be able to trace which
hosts an end-user has communicated with in the case a law enforcement agency
investigates a crime that has been committed while using a public Internet
access service. With this information an end-user can be binded to which
hosts it has communicated with.
The chosen solution takes advantage of the connection tracking system found
in the Linux kernel, for acquiring the connection information from TCP and
UDP connections. This has the advantage that UDP can be seen as a stateful
protocol. The advantage of this is that data acquisition from every UDP
packet is not needed and the wanted information will still be acquired, in
the same way as for TCP connections. Another advantage is that information
of how long time a UDP and TCP connection approximately lasted will be
The system was implemented to be able to function in the Aptilo Networks
system and was evaluated on real data. The evaluation has shown the
scalability of the approach and provides a measure for the performance and
Author(s): Magnus Florán
Contact: Simin Nadjm-Tehrani
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