AAU Student Projects - visit Aalborg University's student projects portal
A master's thesis from Aalborg University
Book cover


Radio Security/Privacy and complexity Trade-offs for 4G

Authors

;

Term

10. term

Publication year

2008

Pages

73

Abstract

I trådløs kommunikation kan transmissioner blive opfanget af aflyttere. Dette projekt undersøger, hvordan man kan forbedre sikkerheden på det fysiske lag (selve radiosignalerne), så hjemmebrugere ikke behøver at konfigurere sikkerhedsindstillinger manuelt. Vi studerer et beam‑hopping‑mønster i adgangspunktet: enheden styrer sin stråle mod den tilsigtede bruger og vælger, hvilken retning data sendes i. Vi kombinerer dette med effektsstyring for at holde den modtagne effekt hos målbrugeren nogenlunde konstant under hele forbindelsen. Arbejdet har to dele: (1) evaluere, hvor godt beam‑hopping svækker signalet, som en aflytter modtager, samtidig med at forbindelsen til målbrugeren er stærk; og (2) undersøge Automatisk Forstærkningskontrol (AGC), en proces for effektsstyring, og kombinere den med beam‑hopping for yderligere at forstyrre aflytterens signal og gøre det meget svært at dekode signaler fra adgangspunktet.

Wireless transmissions can be intercepted by eavesdroppers. This project explores improving security at the physical layer (the level of the radio signals) so home users do not need to configure security settings themselves. We study a beam‑hopping pattern at the access point: the device steers its signal toward the intended user, choosing the direction in which it sends data. We combine this with power control to keep the target user’s received power roughly constant throughout a session. The work has two parts: (1) evaluate how well beam‑hopping weakens the signal that an eavesdropper receives while maintaining a strong link to the target user; and (2) investigate Automatic Gain Control (AGC), a power‑control process, and combine it with beam‑hopping to further disturb the eavesdropper’s signal and make decoding signals from the access point much harder.

[This abstract was generated with the help of AI]