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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.

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52 views

Mobile call encryption

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
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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 ...
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1answer
140 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 ...
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2answers
53 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
67 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
100 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 ...
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0answers
30 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?
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2answers
78 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
95 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
169 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
128 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
87 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 ...
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3answers
156 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?
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3answers
158 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
93 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
96 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 ...
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0answers
88 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
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2answers
660 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 ...
4
votes
3answers
306 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. ...
11
votes
5answers
452 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
450 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
181 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
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2answers
327 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
175 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
103 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. ...
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votes
1answer
106 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?
77
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 (...
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1answer
124 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
200 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 ...
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3answers
4k 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 ...
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1answer
1k 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
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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
261 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
380 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
198 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
412 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
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0answers
167 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
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0answers
75 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
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0answers
65 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
160 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
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1answer
704 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
436 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 ...
2
votes
1answer
235 views

Is there a risk with making my Device ID public?

When making a mobile app with ads, I am required to register my test phones as test devices by providing the Device ID. These Device IDs are unique to an individual phone. Is there any risk with ...
4
votes
2answers
864 views

the new Nokia 3310 recommended for privacy and security?

the new Nokia 3310 (A modern classic reimagined) is very cheap. Do yo recommend it for privacy and security (second phone)? Network and connectivity Network speed 2G Networks GSM 900/1800 MHz ...
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2answers
266 views

SMS based authentication, handling recycled phone numbers?

If a site requires you to authenticate with only a phone number and a one time login code, what safeguards can be put in place such that when I change my phone number and the phone company recycles it,...
5
votes
1answer
258 views

Should 2FA over SMS be considered insecure in the wake of recent SS7 attacks?

Design flaws related to SS7 has been known to us for quite a while now but telcos have conveniently discarded the arguments saying that the risk is too low due to the significant investments required ...