Stute, Milan ; Kreitschmann, David ; Hollick, Matthias (2020)
One Billion Apples' Secret Sauce: Recipe for the Apple Wireless Direct Link Ad hoc Protocol.
24th Annual International Conference on Mobile Computing and Networking (ACM MobiCom 2018). New Delhi India (29.10.-2.11.2018)
doi: 10.25534/tuprints-00013315
Konferenzveröffentlichung, Zweitveröffentlichung, Postprint
Kurzbeschreibung (Abstract)
Apple Wireless Direct Link (AWDL) is a proprietary and undocumented IEEE 802.11-based ad hoc protocol. Apple first introduced AWDL around 2014 and has since integrated it into its entire product line, including iPhone and Mac. While we have found that AWDL drives popular applications such as AirPlay and AirDrop on more than one billion end-user devices, neither the protocol itself nor potential security and Wi-Fi coexistence issues have been studied. In this paper, we present the operation of the protocol as the result of binary and runtime analysis. In short, each AWDL node announces a sequence of Availability Windows (AWs) indicating its readiness to communicate with other AWDL nodes. An elected master node synchronizes these sequences. Outside the AWs, nodes can tune their Wi-Fi radio to a different channel to communicate with an access point, or could turn it off to save energy. Based on our analysis, we conduct experiments to study the master election process, synchronization accuracy, channel hopping dynamics, and achievable throughput. We conduct a preliminary security assessment and publish an open source Wireshark dissector for AWDL to nourish future work.
| Typ des Eintrags: | Konferenzveröffentlichung |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Stute, Milan ; Kreitschmann, David ; Hollick, Matthias |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | One Billion Apples' Secret Sauce: Recipe for the Apple Wireless Direct Link Ad hoc Protocol |
| Sprache: | Englisch |
| Publikationsjahr: | 2020 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2018 |
| Ort der Erstveröffentlichung: | New York, NY |
| Verlag: | Association for Computing Machinery |
| Buchtitel: | MobiCom '18: Proceedings of the 24th Annual International Conference on Mobile Computing and Networking |
| Veranstaltungstitel: | 24th Annual International Conference on Mobile Computing and Networking (ACM MobiCom 2018) |
| Veranstaltungsort: | New Delhi India |
| Veranstaltungsdatum: | 29.10.-2.11.2018 |
| DOI: | 10.25534/tuprints-00013315 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/13315 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichungsservice |
| Kurzbeschreibung (Abstract): | Apple Wireless Direct Link (AWDL) is a proprietary and undocumented IEEE 802.11-based ad hoc protocol. Apple first introduced AWDL around 2014 and has since integrated it into its entire product line, including iPhone and Mac. While we have found that AWDL drives popular applications such as AirPlay and AirDrop on more than one billion end-user devices, neither the protocol itself nor potential security and Wi-Fi coexistence issues have been studied. In this paper, we present the operation of the protocol as the result of binary and runtime analysis. In short, each AWDL node announces a sequence of Availability Windows (AWs) indicating its readiness to communicate with other AWDL nodes. An elected master node synchronizes these sequences. Outside the AWs, nodes can tune their Wi-Fi radio to a different channel to communicate with an access point, or could turn it off to save energy. Based on our analysis, we conduct experiments to study the master election process, synchronization accuracy, channel hopping dynamics, and achievable throughput. We conduct a preliminary security assessment and publish an open source Wireshark dissector for AWDL to nourish future work. |
| Status: | Postprint |
| URN: | urn:nbn:de:tuda-tuprints-133151 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 000 Allgemeines, Informatik, Informationswissenschaft > 004 Informatik |
| Fachbereich(e)/-gebiet(e): | 20 Fachbereich Informatik 20 Fachbereich Informatik > Sichere Mobile Netze Profilbereiche Profilbereiche > Cybersicherheit (CYSEC) LOEWE LOEWE > LOEWE-Schwerpunkte LOEWE > LOEWE-Schwerpunkte > NICER – Vernetzte infrastrukturlose Kooperation zur Krisenbewältigung LOEWE > LOEWE-Zentren LOEWE > LOEWE-Zentren > CRISP - Center for Research in Security and Privacy |
| Hinterlegungsdatum: | 30 Nov 2020 12:26 |
| Letzte Änderung: | 20 Okt 2023 09:43 |
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