Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [cellular]

The tag has no usage guidance.

2
votes
0answers
115 views

Can SS7 attacks intercept SMS sent to a Google Voice number?

Hackers are able to steal 2FA SMS messages by exploiting SS7. As far as my understanding goes, this means gaining access to the SS7 system and then broadcasting a message akin to "This number is ...
39
votes
3answers
7k views

Does Lawful Interception of 4G / the proposed 5G provide a back door for hackers as well?

A common saying among people in the field of cryptography and security is that when providing a back door to law enforcement, you also provide a back door for hackers. I was trying to examine the ...
2
votes
1answer
143 views

What happens if incorrect SIM card PUK entered 10 times?

I know that if incorrect SIM card PIN is entered three times, it is erased, so there is no longer any valid PIN, but user can set up new PIN with PUK. But when incorrect PUK is entered 10 times, it is ...
0
votes
0answers
206 views

What are the dangers of using 3g/4g in smartphones?

Since we should always avoid public networks, is there some sort of attack that intercept my online activity or steal passwords when I'm using 3g/4g? If exists, how I can protect myself from this type ...
1
vote
1answer
165 views

Do mobile phones automatically connect to spoofed cellular tower antenna?

I was told that an attacker is able to create a fake cellular tower antenna imitator near your mobile phone, and your phone will automatically connect to it, whether that antenna has an encrypted ...
0
votes
0answers
73 views

Does a SIM Card provide the cellular radio with temporary keys?

I understand that a SIM card is essentially a self contained computer, on which an algorithm is run that will receive a RAND from a network operator, and use it compute temporary keys (CK and IK) ...
0
votes
1answer
210 views

Can a SIM-less smartphone be tracked only by IMEI?

If in the phone is no SIM card, connection to cell towers is at my own behest. But what about the opposite way, can the local base stations search for a specific phone through its IMEI? Question ...
3
votes
1answer
132 views

Is Duo MFA vulnerable to a SIM swap exploit?

I'm looking into MFA options for a group of around 1000 people. Duo is intriguing, but I'm not sure I'm comfortable implementing something that incorporates text messaging (in contrast to something ...
4
votes
2answers
251 views

Security of WWAN cards in laptops

I'm thinking about buying a WWAN card for my laptop (like this one here), as it is more convenient to use than USB tethering. However, I'm concerned about the security risk that comes with such a card ...
0
votes
0answers
283 views

How do 'fake cell towers' work? And besides bugging and tracking what are they used for?

A friend of mine used an app that detects suspicious cell towers and has been getting warnings today. He is worried about the possibility that someone may be specifically targeting him, which leads me ...
4
votes
1answer
260 views

Why does cellular communication protocols use A5 or KASUMI and not AES or 3DES or RSA

Why does cellular communication protocols use A5 or KASUMI and not AES or 3DES or RSA? I have read that A5 is not that secure, is this the case? Are A5 or KASUMI used anywhere else? Why only in ...
0
votes
1answer
365 views

Is it possible to track a SIM card even if the cell phone is turned off?

I'm wondering if it is technically possible to track a SIM card inserted in a cell phone with sufficiently charge in the battery.
2
votes
1answer
407 views

When it is possible to locate/trace SMS sender?

I have read this question (which is closed) and already answered. Quoting the answer: There is no location transmitted within a normal SMS message (unless added by the author) so as the ...
1
vote
2answers
232 views

What threat model implies any benefit to drug dealers using candy bar dumb phones for business with iPhones for personal use?

I mean if law enforcement or other state actors are surveiling their comms, it makes sense to have it be anonymous, but I just saw a guy who was obviously a drug dealer in the underground with an ...
192
votes
7answers
24k views

How do mobile carriers know video resolution over HTTPS connections?

Verizon is modifying their "unlimited" data plans. Customers in the USA can stream video at 480p -or- pay to unlock higher resolutions (both 720p and +1080p). They are not the only mobile carrier to ...
1
vote
0answers
65 views

Why is Bluetooth Using Cellular Data when it is turned off?

I reset the Cellular data statistics on my iPhone 6 yesterday and went to Settings > Cellular > System Services. I noticed that Bluetooth had used 3.3 KB of Cellular data. A few hours later, I noticed ...
2
votes
1answer
178 views

Can my cell phone company access videos and other documents on my old cell phone?

I have my old smartphone with me, with the old sim card still inside. When I received that phone 4 years ago, it was locked by my cell phone company. However, I am not using it at the present moment, ...
4
votes
1answer
165 views

How serious is the Borgaonkar/Hirschi attack on 3/4g cellular security

At Blackhat yesterday Ravishankar Borgaonkar and Lucca Hirschi revealed an attack on the security protocols underlying current 3/4g networks. Parts of the tech press are have indicated this could ...
5
votes
2answers
8k views

Did I stumble upon a cell hidden network or is my device being attacked?

Sorry for the somewhat vague title, it is hard to explain without the pictures as the network I connected to is Chinese (I believe). Note the cell signal in the top left corner and the name of the ...
1
vote
0answers
70 views

Is there a “whois” for telephone numbers? Can I determine the “last port date”?

To combat against phone number porting fraud/hacks, I'd like to verify if a given number Has been recently ported (within x days) Is queued to be ported Has other "whois" attributes that could be a ...
7
votes
2answers
3k views

How SS7 attack first enter into SS7 network?

I've read the following article about SS7 attack: https://berlin.ccc.de/~tobias/31c3-ss7-locate-track-manipulate.pdf I have some questions about this kind of attack: Is SS7 attack can be done ...
0
votes
1answer
73 views

Can a cellular base station be accessed from within the 4g network it provides?

Cellular base stations can be accessed directly via the internet for maintenance purposes, they have control ports such as ports 5700, 5701, 5702. What I'm wondering is if I connect my device to the ...
3
votes
1answer
273 views

Do SS7-based attacks affect landlines?

I am aware of the risks of SS7 for mobile users. Attackers can get location information, send spoofed texts, cause DoS and intercept phone calls/texts. Do those risks still apply for landlines? There ...
7
votes
2answers
10k views

How does mobile free internet bypass works? (UBT / FBT)

I have encountered a mobile application named "HTTP Injector" which lets you get free internet access (UBT / FBT). The process to get it work and receive free internet seems to be as follows: ...
67
votes
5answers
17k views

Is a 'dumbphone' mobile more secure for basic phone calls than a smartphone?

By dumbphone I mean: no internet connection, very limited features, etc. By more secure I mean: secure from malicious and direct hacking. I don't mean as in protected from government tapping/snooping;...
2
votes
1answer
195 views

What is the state of 3G data cryptography?

A client of my company is currently using a solution where they've invented a UDP protocol that communicated with no TLS over regular 3G in small embedded devices. Their cellular provider, KORE, ...
6
votes
2answers
469 views

Methods to detect calls being routed through Stingray devices?

Are there any methods for a non-jail broken Apple iPhone to detect rogue cellular towers? Such as the "Stingray" device that mimics cellular towers. From the Apple iPhone user's endpoint side, is ...
3
votes
1answer
122 views

Are there any signs for an end-user of cellular calls being routed through a Stingray device?

The Stingray is a small device that mimics cellular towers. From the user's endpoint side, is there any way to detect you are being routed through a rogue cellular tower?
1
vote
1answer
129 views

What are the possible security settings of an iPhone iOS for the maximum possible security?

Imagine a nation-state is after you. Is there a list of recommended security settings for the iPhone to give a critical/maximum possible level of local security?
3
votes
2answers
615 views

Can someone take down my mobile data connection?

I have a friend who says that he can take down anyones mobile data connection and one day he did it while I was in the tram with him. Is it possible that someone can DDOS your mobile data connection, ...
-1
votes
1answer
88 views

Cell phone privacy [closed]

I keep hearing about cell phone tracking, but I always wondered how common is it? Is it something that only 3 letter agencies can do or is it something pretty common? I've seen those websites that ...
1
vote
4answers
1k views

Can I set up a 3g/4g Connection Proxy for Table/Phone App Pen Testing?

I would like to set up a testing environment for smartphone and tablet apps that can intercept 3g/4g communications and provide a traffic dump. I'd like to see all the 3g/4g traffic coming from, or ...