Journal article

POLČÁK Libor, HRANICKÝ Radek and MARTÍNEK Tomáš. On Identities in Modern Networks. The Journal of Digital Forensics, Security and Law. 2014, vol. 2014, no. 2, pp. 9-22. ISSN 1558-7215. Available from:
Publication language:english
Original title:On Identities in Modern Networks
Title (cs):Identita v moderních sítích
Journal:The Journal of Digital Forensics, Security and Law, Vol. 2014, No. 2, US
Lawful interception, intercept related information, content of communication, user identities, identification, linkability
Communicating parties inside computer networks use different kind of identifiers. Some of these identifiers are stable, e.g., logins used to access a specific service, some are only temporary, e.g., dynamically assigned IP addresses. This paper tackles several challenges of lawful interception that emerged in modern networks. The main contribution is the graph model that links identities learnt from various sources distributed in a network. The inferred identities result into an interception of more detailed data in conformance with the issued court order. The approach deals with network address translation, short-lived identifiers and simultaneous usage of different identities. The approach was evaluated to be viable during real network testing based on various means to learn identities of users connected to a network.
   author = {Libor Pol{\v{c}}{\'{a}}k and Radek Hranick{\'{y}} and
	Tom{\'{a}}{\v{s}} Mart{\'{i}}nek},
   title = {On Identities in Modern Networks},
   pages = {9--22},
   journal = {The Journal of Digital Forensics, Security and Law},
   volume = {2014},
   number = {2},
   year = {2014},
   ISSN = {1558-7215},
   language = {english},
   url = {}

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