Collaborate Disseminate
One of the most convenient things about having cats is their independent lifestyle: most are happy to enjoy themselves outside all day, only coming back home when it’s time for …read more Continue reading Handmade GPS Tracker Keeps an Eye on Adventurous Cats
I have enabled a function in my mobile phone, that uses my home Wi-Fi network to make calls when the cellular signal does not exist. As far as I know, the cellphone provider charges me as though I make calls through its cellular network.
W… Continue reading Are phone calls via WiFi VOIP encrypted by A5/1, A5/2, and A5/3?
I have done some search here but I can’t understand how phones and antennas share the keys used for encryption and decryption.
As far as I understand, mobile phones today use LTE i.e 4G (sometimes they downgrade 3G, 2G etc because of cover… Continue reading Cell tower to cell phone encrypted communication
I read that phones encrypt communication (GSM as implemented in 2G,3G..) – particularly voice as SMS are unencrypted – using a stream cipher.
Symmetric Stream ciphers use the flip-flop machinery to start (a true random generator imho), and… Continue reading How is the stream cipher key shared on GSM?
A burglar took my phone so I reported it to the police and phone company to blacklist it. They only asked for the first IMEI even though the phone has two IMEI since it can accomodate two SIMs. The IMEIs are consecutive when stripping the … Continue reading Reporting dual sim phone stolen [closed]
The late 90s and early 2000s were a breakout time for mobile phones, with cheap GSM handsets ushering in the era in which pretty much everybody had a phone. Back …read more Continue reading Here’s How Those Battery-Free Flashing Phone Stickers Worked
ETSI TS 135 206 defines the specification of MILENAGE algorithm which is an authentication algorithm for mobile networks.
It defines ‘OPc’ as below:
a 128-bit value derived from OP and K and used within the computation
of the functions.
… Continue reading How to calculate Millenage OPc value while OP stored in HSM?
Say we have a remote transmitter that is not connected to a wifi router (neither wirelessly nor by cable), but which transmits information using electromagnetic waves. Examples include walkie-talkies, mobile phones, and other devices like … Continue reading Can a wifi Access Point be reconfigured to receive other radio signals?
I’m looking for a way to detect and intercept sms sent to nearby smartphones.
I’ve already read about fake GSM stations, but I was wondering if it is possible to intercept an sms with a near smartphone, they use the same frequency, right? … Continue reading Eavesdrop SMS with another smartphone
I periodically receive "cell broadcast" from the number 31227 on my smartphone. The content is illegible and as follows:
ààààààààààààààààààààààààààààààààààààààààààààà
ààààààààààààààààààààààààààààààààààààààààààààà
ààààààà
Any idea… Continue reading Receiving strange cell broadcast on smartphone – What does it mean [closed]