C3Subtitles: 31c3: osmo-gmr: What's up with sat-phones ?
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osmo-gmr: What's up with sat-phones ?

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Video duration
00:58:05
Language
English
Abstract
At 28C3 we introduced the very first steps of the osmo-gmr projects. During this talk, we will present the various advances that have been made in this project on various aspects (voice codec, crypto algorithm, ...)

GMR-1 (GEO Mobile Radio) is a satellite phone protocol derived from GSM. The main operator using this protocol is Thuraya and is mainly active in the middle east and asia.

osmo-gmr is a project of the osmocom family whose goal is to implement the various levels of a GMR stacks, starting from SDR signal acquisition up to the actual voice layer.

At 28C3 we gave and introductory talk to the project which was pretty new at the time. On this talk, we will quickly summarize what was presented last time and then move on to the new stuff.

The two main obstacles to implement a practical monitoring software for GMR-1 were the secret crypto algorithm and the unknown voice codec. Both obstacles have now been lifted and we will present the details of how that happened. We will also look toward the next steps and other aspects of the system that we're planning to dig into.

Talk ID
6267
Event:
31c3
Day
1
Room
Saal G
Start
4 p.m.
Duration
01:00:00
Track
Security & Hacking
Type of
lecture
Speaker
Sylvain Munaut

Talk & Speaker speed statistics

Very rough underestimation:
148.4 wpm
806.5 spm
149.4 wpm
812.8 spm
100.0% Checking done100.0%
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Talk & Speaker speed statistics with word clouds

Whole talk:
148.4 wpm
806.5 spm
Sylvain Munaut:
149.4 wpm
812.8 spm