IT Security Stack Exchange
IT Security Stack Exchange

Questions tagged [gsm]

a standard developed by the European Telecommunications Standards Institute for the second generation of digital cellular networks, used by mobile phones. It is the default global standard for mobile communications.

GSM is a standard developed by the European Telecommunications Standards Institute for the second generation of digital cellular networks, used by mobile phones. It is the default global standard for mobile communications.

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Are phone calls on a GSM network encrypted?

When I make a call on my cellphone (on a GSM network), is it encrypted?
Ram Rachum
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Why is GSM still used?

GSMs vulnerabilities have been known a long time now. UMTS was supposed to fix those problems. Why is GSM still used?
kutschkem
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A security concern I dicovered with simcard devices

Well, it all started when I wanted to take the sim card out of my tablet and I was about to shut it down so that I could take the simcard out. But then a thought raced through my mind, "What if I take out the simcard before I turn off the tablet and…
Jeffry
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Are SMS,MMS stored on the network service providers' servers?

Are SMS and MMS sent via a mobile phone stored on telecommunication service providers' servers before passing them to the recipient? Does it depend on the country or does every network service provider have the resources to do something like this?
dev1234
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Strategies against jamming attacks?

We have some devices which are designed to use standard frequencies/protocols, such as GSM, CDMA, GPS, Wifi and Bluetooth, among others. While our focus is not thought to be used for high-profile criminals (such as organized crime) who will often…
Mamsaac
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How to spoof a cell phone tower (cell site, base station) -- homemade IMSI-Catcher

An answer to a recent question has given me an idea for a school project (security CS program). Also, an active attacker (with a fake base station) can potentially force a mobile phone to use another variant [of encryption]... This sounds very…
jtpereyda
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Smartphone / GSM Sniffer

This question would be in the category of SmartPhone Sniffers. So we have sniffers that can show the packets that are being sent across a wired or wireless (802.11) network. I am just performing a basic research on GSM Sniffers and I would like to…
Legolas
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Mobile numbers capture and transmit data

will it be possible to build a low cost hardware/software device which can capture mobile numbers within a specified radius and then use that information to transmit an sms to those numbers? From what I've read online, the actual phone numbers are…
Innocuous
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Cellular encryption algorithms currently in use globally

I have been doing research on the available encryption algorithms used by commercial mobile providers worldwide, and would like to know if the following list is complete: Algorithms for voice encryption: A5/1: the "original" unweakened GSM…
Nasrus
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GSM encryption suppression

The following papers explain that it is possible to suppress the encryption (or downgrade) in GSM using faked…
slashcrypto
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What is the proliferation of IMSI Catchers?

We know that IMSI-catcher detectors such as the Android-IMSI-Catcher-Detector project exist, but has anyone done a field study across various parts of the world as to how many there are and where? Would be curious to see a map of the world…
atdre
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Getting strange texts to an iPhone #PWD123456#00X

My dad is getting strange SMS texts to his iPhone 4 Some examples: #PWD123456#WHL003=2308480298 #PWD123456#WHL004=2398480389 #PWD123456#WHL002 #PWD123456#WHL002 #PWD123456#STATUS? #PWD123456#OUT1=ON Googling reveals this GSM-Auto Controller user…
yumaikas
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Hacking/Sniffing/recording GSM like Karsten Nohl

For a course at college, I wanted to reproduce the attack on GSM shown in this video by Karsten Nohl: https://www.youtube.com/watch?v=0hjn-BP8nro. From what I understand he used an USRP radio to record the data. Those devices all cost starting at…
populus
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sniffing/recording GSM 3G signals

Is it possible to sniff or record and process GSM 3G signals (from some reciever) given that there is no other signals interrupting etc (the most comfortable conditions) Update (with some supporting material…
Nick Ginanto
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Is there a way to notify me when my Android phone connects to an unencrypted GSM network?

As far as I know when a phone connects to a GSM (2G or 3G) network, the connection is encrypted. When I get in range of let's say an IMSI Catcher, I imagine this connection will not be encrypted in any way, so they can listen to all my calls. Is…
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