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Questions tagged [phone]

A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are not in the same vicinity of each other to be heard directly.

3
votes
1answer
44 views

GSM - Implementing Cipher Mode Command on YateBTS

I've been studying on Yate & YateBTS source code for a while, and I was wondering why there is no ciphering mode implementation in the source!? I use the combination of BladeRF x40 FPGA and ...
9
votes
1answer
320 views

How secure is a land line phone call?

What are the risks of communicating sensitive information using a land line? Once my voice gets digitized does the carrier use encryption during transport? We have all heard about rogue cell towers (...
0
votes
1answer
56 views

How are USSD messages used and who could send them?

Some illegal ads started showing up on my Android phone as message boxes recently. They are said to be "USSD messages" in an app recording notifications (com.evanhe.nhfree). There is a Wikipedia ...
1
vote
3answers
90 views

Can we wipe an Android phone completely using Encryption and Factory Wipe? (Samsung Galaxy S7 to be exact)

Can we wipe an Android phone completely using Encryption and Factory Wipe? (Samsung Galaxy S7 to be exact) I have a Samsung Galaxy S7. I believe cell phones use flash storage (like SSD) and its not ...
0
votes
1answer
124 views

Mobile call encryption [duplicate]

Is the signals of a mobile phone-call encrypted between the phone and the mobile-tower or only between the towers? And is it possible for a non-authority individual to eavesdrop on your conversation ...
29
votes
4answers
3k views

How should I verify a caller is from the bank or company they claim? [duplicate]

I often get telephone calls from my personal bank, mortgage provider or utility companies. In most cases they start by asking me to verify my identity through the usual name/address/date of birth or ...
-3
votes
1answer
320 views

How To detect Fake mobile number for SMS verification [closed]

I am facing some issues regarding SMS verification in my website. Suddenly, some transactions are happening using the fake numbers like https://www.receive-sms-online.info How to detect the number is ...
1
vote
2answers
56 views

At What Point Does A Device Correspond/Link to its Owner?

I am aware that governments, organizations and hackers can do a plethora of things to your device (i.e. track your location, tap calls, etc.), but I can only assume that they can only do these things ...
2
votes
1answer
70 views

Can Apple Devices Give Away Location to Hackers?

In a hypothetical scenario, I am travelling with my iPhone to, let's say, New Zealand. I stop at some random hotel and simply stay there doing nothing but staring at a wall for days with no ...
2
votes
1answer
110 views

Phone Number Appears to Have Been Temporarily Hijacked

What Happened: At 8:40am Telegram sends me a login code via the Telegram desktop app. At 8:44am Telegram informs me that someone has logged into my account via ip address #1 (appears to be PIA vpn) I ...
0
votes
0answers
32 views

VoIP/SIP Secured Real Time Protocol (SRTP): Which key length is appropriate nowadays?

Many critics say that current key lengths for SRTP-encryption in popular phone apps like Linphone or CSipSimple are not sufficient anymore. What should be a recommended key length nowadays?
1
vote
2answers
89 views

Can my company see the contents on my iPhone if I used my work email on it?

I'm temporarily employed at a company and I needed to send a quick email to one of my coworkers yesterday explaining that I was going to be late for my shift. I couldn't reach them by phone and didn’...
0
votes
1answer
101 views

Can malware be installed on a mobile phone when the user opens an sms?

Is it possible for an adversary send malware over messages? I mean, when the victim clicks on the message sent by the attacker, a malware should be installed into his phone (in background). The hacker ...
3
votes
0answers
251 views

How secure are IMEI numbers?

I recently had my phone stolen (Galaxy S8) and have done the following: Wiped it remotely Reported the theft to network operator, who have allegedly blocked the EMEI I have tried searching for ...
3
votes
2answers
133 views

Possibility of business calls/leads being professionally stolen? [closed]

Is it possible our VoIP calls being redirected from our intended phone number to another phone number unknown to us? Our VoIP number is currently forwarded to mobile phones and computer phones. ...
2
votes
1answer
90 views

Privacy concern: Services requiring a phone number for signing up

Whenever a service requires an e-mail address for creating an account, I feel mildly uncomfortable, but I can easily eliminate my privacy concerns by setting up a new e-mail address that forwards mail ...
0
votes
3answers
197 views

Tracking phone in country when SIM is not supported [closed]

Can the police track my cell phone if I left the country and went to another one and the SIM card is not supported by the country I went to?
0
votes
3answers
202 views

If you phone is seized, can you erase sim or stop them from cloning?

If your phone (for example, an iPhone) gets seized by the police, do they have sufficient technology to copy sim card (or any data) even if you cancel you provider and put phone in lost mode? If so, ...
2
votes
1answer
96 views

Dangers of giving away Cell phone details

I got a spam call saying saying they are upgrading my plan but needed some details. Obviously I knew what it was and gave them fake info. My question is given the information they asked for what are ...
2
votes
1answer
114 views

Are there any known exploits targeting Google Authenticator on Android phones?

My Android 7.0 phone is somewhat lagging behind on the security updates, a situation I cannot change unfortunately (unless I would root the phone). I am not too concerned about this in general since ...
0
votes
0answers
120 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 ...
0
votes
2answers
1k views

Is Paypal's 2FA Security really this bad? [closed]

I'm by now means an expert in this field, or even well versed, but if it's possible to do this, I can't comprehend how Paypal allows it. Say you have 2 factor authentication on, with your phone setup ...
3
votes
3answers
390 views

I connected to a suspicious public wifi using my phone. Is it possible that my phone was hacked?

I recently was outside looking for public wifi because my android mobile internet wasn't very good. I went past a garage that had free wifi apparently, so I went up there and connected to their wifi. ...
10
votes
5answers
460 views

What is the best protocol for an organisation to make phone calls to clients, where the client is required to verify their identity?

I've experienced a couple of times, an organisation has called me, but they require me verify who I am with security questions. Most recently, this was my credit card company who left a voice ...
4
votes
4answers
455 views

Phone number setup for security

Several Q&As here highlight the danger of phone hacking. For example, this. In a nutshell, the solution is to NOT give your phone number, except to your bank or government. Unfortunately, that ...
3
votes
1answer
187 views

How can I know that whoever called me is my cellphone service provider?

I just refused to give my credentials to a phone call operator who called me. and I wonder whether I did the right thing. Background. My cellphone operator (call them Alpha) uses a simple ...
0
votes
2answers
329 views

How to set up security on my phone [duplicate]

I am using my friends Wi-Fi and I don't want anyone else using the same Wi-Fi to be able to see what I am doing on my phone. How do I put up some kind of security so that people in the same network ...
3
votes
4answers
181 views

How advisable is to give my phone number as part of dating/ casually socializing?

TLDR: What are the risks, consequences, of giving my phone number to civilian people I meet while socializing/dating or in casual life? If a bad actor gets my phone number, what attacks to expect, and ...
0
votes
1answer
108 views

Found recording of unkown phone call - did someone hack my Android phone? [closed]

I installed a phone recorder on my Android just to have memories of my mother's calls. Yesterday the memory was full, and in the call history I found an unknown number I know I never answered to. And ...
30
votes
4answers
6k views

How can a website verify that my phone number belongs to me?

I was signing into a Capital One credit card website that I hadn't used in a long time, and once I entered my user name and password, it requested my mobile phone number for additional verification. ...
-2
votes
1answer
111 views

What phone would be most private and what aspects to consider? [closed]

I want to change my phone and I would not use it for anything than calling and messaging. I would be happy to have phone the most private friendly and secure against any type of information withdraw ...
10
votes
3answers
2k views

Can an infected phone infect other computers in a network?

Can an infected phone infect other computers in a network? For example do you need to worry about private phones in a company enviroment? Or is that already paranoid?
76
votes
2answers
6k views

Can phone apps read my clipboard?

Via Hacker News, I came across a Tweet implying that Facebook's iOS app routinely reads and transmits all content from the user's pasteboard. Leaving aside whether Facebook's app genuinely does this (...
1
vote
1answer
127 views

How does a phone call / SMS message verify my identity

More and more I've been seeing online services that want to verify my identity using an automated phone call or text message. The trouble is - they ask me to provide the phone number! It seems the ...
2
votes
1answer
207 views

Is it possible to hack a phone just inputting dialer codes?

I'm currently in Germany, and today a woman asked if she could borrow my phone on the street, as she needed to make an urgent call. The thing is that I lended her my phone and, while I was making sure ...
8
votes
3answers
2k views

Someone is making random calls spoofing my phone number. What to do?

For the past six months, I've experienced call-backs from foreign numbers (all within the EU) telling me that I had called them earlier. At first, I thought the calls are malicious. However, due to ...
0
votes
3answers
5k views

Can an unregistered phone with a prepaid SIM card be traced by police? [closed]

Let's say that someone is using an unregistered phone (I mean just a phone that he bought in another country) with a prepaid SIM card without registering. The person is sending messages only on ...
-3
votes
1answer
2k views

I have someone that is controlling my phone from another device [closed]

How do I stop somebody from controlling my phone from another device and taking my data and stealing my information?
3
votes
1answer
120 views

I want to change my phone number, how can that affect my security & privacy?

Today I called my ISP and ask them about changing my phone number, after all my questions concerning ownership the bottom line was that after quarantine expires someone will be able to take that ...
5
votes
1answer
265 views

Is inputting a password over a phone secure

When calling my bank, they require you to input your username and password using the phone keypad. Is this a safe practice? Specifically, is this less secure than inputting my password on their ...
4
votes
1answer
409 views

Tools for phreaking? [closed]

Does Kali Linux offers tools and programs for testing security of telephones? If not, where can I get tools for this? Literally a pentest suite but focused on telephone networks, SIM cards, mobile ...
2
votes
1answer
255 views

Can you compromise a phone with a SIM card?

If you are traveling abroad and buy a prepaid SIM card to use in that country in your phone, what kind of vulnerability are you exposing yourself to? Can a malicious SIM access information on my phone?...
2
votes
2answers
461 views

How can someone use my phone to make an outgoing call and have it show up to network provider as my number that made the call?

I made a call to co-worker this morning. While I was talking the call disconnected. When I looked at my phone it was making a call to another number, which I did not recognize. I let the call connect ...
1
vote
0answers
199 views

What can prompt a voice announcing “Your phone call is now being recorded” during a phone call? [closed]

A user has reported that during a phone call to the user's SO (significant other), they both heard one or two beeps followed by a voice (English) announcing something similar to "This phone call is ...
2
votes
0answers
79 views

Why don't cell towers authenticate with cell phones? [duplicate]

Stingrays exploit a significant security vulnerability of cell phones: phones attempt to identify themselves to, and even worse, continue to use fake towers. Why not have towers authenticate ...
2
votes
0answers
67 views

Are there any good OSINT feeds related to phone phishing? [closed]

There are lots of feeds related to fraudulent and malicious domains and IPs, but we're seeing more and more social engineering attempts coming in via phone. When these are reported to us, I'd like to ...
2
votes
1answer
166 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, ...
2
votes
1answer
135 views

How would someone find a phone number after they change it? [closed]

Not sure if this is the place to ask this, but can't find a better SE section to ask on. I've been trying to help someone with securing someone's relocation from a domestic abuse case. After changing ...
10
votes
1answer
800 views

Implications of prominent *secure messaging apps* requiring phone number identifiers

More specifically and also generally than this related question, I'm curious about the privacy implications of prominent secure messaging apps (marketing themselves as protecting users' privacy) ...
5
votes
1answer
518 views

If my phone for two factor authentication is stolen, can the attacker access my account via an email password reset?

Suppose I setup an online account with 2FA on my phone, and an attacker gains access to my phone. My phone is logged into my email account. The attacker knows my online service's account username or ...