As a part of the Modern Tools for Detection and Mitigation of Cyber Criminality on the New Generation Internet project, a Lawful Interception System was developed. This thesis describes additions to the system, which provide a capability to intercept application protocols (eg. an e-mail communication) directly in a network of an Internet service provider. This new functionality enables automatic detection and filtering of a related TCP transfer. It is also able to handle situations, in which the identity (an IP address) of a target user is not known yet, or when it is difficult to detect it (NAT is in progress, user is at an Internet café, behind the firewall, etc.). One of the most important requirements for the developed prototype is the ability of a fast packet proccessing with maximum throughput and minimal packet loss. Therefore, this thesis also consists of a performance profiling, an identification of critical points and their optimalization.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:236095 |
| Date | January 2014 |
| Creators | Hranický, Radek |
| Contributors | Ryšavý, Ondřej, Polčák, Libor |
| Publisher | Vysoké učení technické v Brně. Fakulta informačních technologií |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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