135 Radio networks (1) Difference to wired networks Bandwidth of transmission remains scarce The current place of the user is also to be protected Assumptions Mobile user station is always identifiable and locatable if the station sends.
{"Image DocumentName": "Radio networks (1) Difference to wired networks Assumptions", "Image ImageDescription": "Bandwidth of transmission remains scarce. The current place of the user is also to be protected. Assumptions. Mobile user station is always identifiable and locatable if the station sends. Mobile user station is not identifiable and locatable if the station only (passively) receives. not. commend-able. not applic-able. Which measures are applicable? + end-to-end encryption. + link encryption. - dummy messages, unobservability of neighboring lines and stations as well digital signal regeneration, superposed sending. now: mobile! Fixed: bandwidth not a problem\u2026 at least we hope \uf04a but radio: maybe for long time scarce\u2026. because it is shared! but on the other side \uf0e0 hugh improvment (LTE)\u2026 cellulare network: shared within a cell \uf0e0 make cell smaller\u2026.\uf0e0 costly\u2026 so for anonymity: do not waste bandwidth \uf0e0 no real flat rates!!! other difference: location!! look at google maps from you mobile and you know how good the location is\u2026 assumptions with respect to attackers\u2026 remeber \u201edigital signal regeneration\u2026 location \uf0e0 see goog maps again! :_) part of GSM standard\u2026 second assumption \u2013 i am not a wirelees enginerr \u2013 not sure if this assumption holds\u2026 applicable measures: end-to-end \u2013 no prob \uf04a - energy! \u2013 broken on GSM \uf04a link encryption: part of gsm/umts\u2026 can be deactivated by the network\u2026 - not shown on mobile! dummy traffic: costly (bandwidth, energy etc.) unobservable\u2026 : to much transmission. dc-net: the same. also: more sending \uf0e0 location revealed! therefore: not much in the wireless network\u2026 \uf0e8 all measures to protect traffic data and data on interests have to be handled in the wired part of the communication network.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}