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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107 views

Ways to protect phone from hacking through a wifi network when travelling

I'm planning on traveling to a resort in Mexico. The resort offers wifi, but I know someone who recently traveled to this resort and had their phone hacked via the wifi network. I would be wanting to ...
6
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3answers
2k views

Wouldn't forging the balance of a prepaid telephone card allow to make a lot of calls?

Suppose I have a prepaid public telephone card containing £5 in it. Now I connect this card to my laptop and figure out where in the card £5 is stored. I then change this to £5000, and leave the rest ...
2
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0answers
23 views

How can I ensure that phone app traffic is using HTTPS? [duplicate]

When I access a website, I know just by looking at the URL whether it's HTTPS or HTTP. If I'm using an app on my phone, I cannot see this. So if say the app wants me to enter a password in to create ...
1
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0answers
90 views

SS7 exploit on the wiretapping part

Wondering if there are info/source code/guide on the SS7 wiretapping part (SMS interception). I had a look on the track any mobile by a German researcher, and on PTsecurity about how the structure ...
4
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1answer
138 views

Can a SIM card propagate malware?

Is it possible that malware can infect a SIM card? What will happen when I insert the SIM card in another phone?
2
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1answer
101 views

How to verify if a phone number is an online SMS account as opposed to a genuine SIM card

We are using Authy for phone number verification on our website. It is very easy to create a free online SMS account through Twilio or other providers. Is there any way to determine whether the phone ...
74
votes
4answers
6k views

Charging someone else's cell phone in my car

A sketchy looking person walked up to my car the other day while I was parking and asked if he could charge his cell phone in my car and offered to pay me $5. I didn't allow him to charge his phone in ...
1
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3answers
88 views

Can a telephone caller be authenticated?

If we assume that the human element is unable or not skilled enough to discover a phishing attempt (or some other malicious endeavor that can be perpetrated verbally), what forms of defense can be ...
24
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3answers
3k views

Listening to phone calls as user profiling for marketing [closed]

I had a landline phone call about xyz with an xyz-expert (also on landline) for about an hour, for the first time. After couple of days I started getting suggested links on websites as an ad exactly ...
-1
votes
2answers
160 views

How can someone spoof texts with my phone number?

A dear friend of mine in the U.S. recently told me that she had been quite hurt by the unkind texts I had sent her after the Holidays. I do not have a texting mobile phone, nor do I do texting from ...
56
votes
11answers
10k views

How would two people with burner phones communicate?

According to Edward Snowden in this tweet... Phones used in real-world ops are disposed on a per-action, or per-call basis. Lifetimes of minutes, hours. Not days. Let's imagine for a moment that ...
3
votes
1answer
103 views

Google Hangout Dialler exposes user ID

Recently, I got in touch with an online supplier of commodity service. Since they are located in location out of country of my residence I used GoogleTalk's IP phone service ‘Hangout Dialler’ as it’s ...
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2answers
68 views

Blackphone - Silentcircle - mobile apps

i have question about blackphone (silent circle). Is there any advantage over other mobile phones if i want to use third party mobile apps? So if I agree with terms of use of some applications, ...
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2answers
382 views

Getting spam calls from numbers similar to my own

My phone number is 456-123-XXXX (American phone number + area code). Over the past few months I get fairly regular spam calls from other numbers also beginning with 456-123-XXXX, where the last four ...
42
votes
5answers
10k views

Is it dangerous to call spam phone numbers, even if you know they're spammers?

I sometimes like to check spam just to see how the messages look like, and I found someone who actually put an American phone number (1-XXX-XXX-XXXX). Most of these spammers are either trying to get ...
0
votes
0answers
16 views

Should I trust on Airpush and give IMEI? [duplicate]

For opting-out from air-push adds on android I can request to Airpush. Visit the relevant post: Is this red star icon malware? How to get rid of it? Is there a reliable way to detect the app ...
5
votes
1answer
94 views

Can I use a satellite phone for 2 factor auth sms and such?

Would 2 factor authentication SMS messages or other kinds of internet security notifications work with satellite phones? E.g. companies like Google, Paypal, Facebook, banking institutions and others ...
0
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1answer
48 views

Can IMSI catchers detect encrypted communications? [closed]

I would like to know if IMSI catchers can detect encrypted communications in general. Anyone got experience with that? Thanks
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1answer
47 views

Using stingray against police (idea) [closed]

This is focusing on UK mainly, where police radios are similar to mobile phones. Pretend it's possible to buy Stingray, the IMSI scanner. Pretend Jimmy is a criminal, waiting for a police raid at any ...
5
votes
2answers
113 views

Security implications of android rooting

I know this question has been asked many times, but I didn't see a clear answer to it from security experts, or it is from several years ago and things might have changed. My question is double: ...
5
votes
2answers
189 views

What happens when you SIM-unlock a cellphone

In the UK the process for unlocking a mobile phone (cellphone) usually involves either buying an "unlock code" from ebay which you then have to put into the phone to unlock it, or taking the phone to ...
5
votes
2answers
744 views

Phone call to try and gain access

About a hour ago I received a call from a suspicious phone number. They explained that they had received an alert from my PC and needed to gain access to correct the problem before my PC was ...
0
votes
1answer
381 views

How WhatsApp identifies a specific user

How does WhatsApp identify a specific user in order to forward the messages to him? Here is what I did: I backed up my iOS App from my old device Restored the backup to the new device Opened ...
0
votes
1answer
102 views

Mobile phone tracking, identification of the attacker [closed]

Once I was told that you can identify if your mobile phone is being tracked by someone (e.g. police), by calling placing a specific prefix to the number. This prefix in my country is normally reserved ...
-4
votes
1answer
63 views

sourcing harrassing texts [closed]

I live in the US. Someone is texting harrassing messages to me. I have done a reverse lookup which dead-ends in a landline number. The number I have has been confirmed by my wireless Carrier. It ...
0
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0answers
32 views

Is there any benefit to re-verifying someones identity on the phone once transferred?

So this example is quite specific. You call up an organisation and they verify your identity using two pieces of information (eg; date of birth, last payment date, mothers maiden name). But then once ...
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2answers
160 views

Can bad guys record phone conversations without the carrier's knowledge?

I know that, in most of the world, phone conversations are transmitted as digital data (whether frames in circuit switched protocols or packets). I know that several companies offer products which ...
0
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0answers
11 views

Multiple service providers to establish link

If data roaming is disabled, could service providers still use links from multiple service providers to establish connections between a carrier and a destination point?
5
votes
1answer
312 views

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 ...
3
votes
1answer
226 views

Smartphone motherboard - Does it hold any data?

I recently went for a smartphone repair and got its motherboard replaced. However, it didn't occur to me to ask for the damaged motherboard back. I had confidential credentials and data stored. No ...
3
votes
1answer
204 views

Privacy issues when mobile app has access to phone number and contacts

It seems that when it comes to mobile apps convenience defeats security - always. In particular all messaging/communication apps seem to require to have access to your contacts on the phone and your ...
3
votes
0answers
43 views

What are the security implication of implementing an IVR functionality in my application?

I am planning to implement an Interactive Voice Recognition (IVR) functionality in my python-based application. I will be using IVR as a backup verification method or when a user is going to setup her ...
1
vote
1answer
217 views

How secure are DECT and 5.8Ghz Digital Cordless home Phones?

Is it safe to assume someone with $1,000-$3,000 U.S. to throw around can purchase the expertise or equipment to tap someone's modern cordless phone via a vulnerability, or otherwise? I mean someone ...
9
votes
2answers
492 views

Random people are coming to my home looking for their lost/stolen cellphones!

Random people are coming to my home saying their lost/stolen cellphone is at my house! The latest person to show up on my door step was at 9pm last night. He said that his "findmyiphone" sent him to ...
73
votes
3answers
10k views

Does hanging up on a UK landline call not terminate the connection?

AgeUK (and others) warn about making phone calls directly after receiving a scam call and advise you to "wait for the line to clear": Use a different phone if you can, or wait 5 to 10 minutes ...
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0answers
132 views

What information can be gained given only a phone number? [closed]

What personal information can be obtained given only a phone number? What information is your phone number publicly (or privately, but with easy access) linked to? Here is the way I am looking at ...
4
votes
1answer
221 views

Why do phones send wifi probes?

They could just listen to beacons. Why do they probe for every network you've ever connected to? Do other wireless devices do this? Does Windows, Linux esp. Kali, do this?
22
votes
2answers
4k views

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 ...
1
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3answers
90 views

Is using my phone number as a pin for a phone a security risk?

I just did a factory reset on my smartphone to see if it might fix issues with battery life. I configured a phone number as the lock screen code so I have a code that's both long and easy to remember. ...
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votes
1answer
352 views

Twitter phone verification while on Tor [closed]

Twitter locked me out of my account. I can log in but I can't do anything with it until I give them a phone number. I've had the account for years but they've decided now there's "suspicious ...
-4
votes
1answer
118 views

How to authenticate a user account from a website over the phone?

A support team is answering calls and providing well support. It would be conceivable for someone to impersonate or ask for something which should be authenticated first. Which are the best methods ...
0
votes
1answer
160 views

The spyware spooks use to hack mobiles [duplicate]

With regards to the report and video link below: How do I guard against this sort of snooping? Is it only possible if unwittingly install some kind of trojan? BBC Click Report: Surveillance ...
2
votes
1answer
227 views

Find out the identity of the person that called you

I once heard that if a number that you don't know called you, you can access a website (that I don't remember now) that will call the number and make a recording of what the person said and send it to ...
12
votes
3answers
460 views

How safe are data you dial to a call center?

Sometimes when you call an administrative service it tells you "Dial 1 to access such service. Dial 2 to access some other service. Otherwise, dial 3." No harm if somebody comes to learn I chose "2". ...
2
votes
1answer
174 views

Scam caller claimed to have elderly friend's “Windows unique identifier”

An elderly friend received a telephone call similar to this Information Security SE post and this one. The caller claimed that my friend's computer had a problem that needed to be fixed. My friend ...
4
votes
1answer
165 views

How secure is VOIP?

I was at a friend's house who uses VOIP on his own private WiFi for his phone calls. He made a call over VOIP (Voice Over Internet Protocol) that included the need to verbally state his credit card ...
1
vote
2answers
465 views

Could one fit a root application in sim card

In the third Mr.Robot episode a character inserted a Micro-SD card in a smartphone in order to root it and gain information, so I thought maybe someone could fit a root-kit on a Sim-card. Would that ...
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votes
2answers
170 views

How do i make a phone number authetication system for my website? [closed]

I really need to prevent users from create multiple accounts. So I was thinking about making a phone number authentication system. Where when a user signs up, a 4 digit code is sent to their phone, ...
1
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1answer
79 views

Does calling with wireless phone have enough security? [closed]

I'd like to know if calling with a wireless phone at home can be heard by neighbours and if it is safe.
1
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1answer
143 views

Is there any way track a Andriod phone using IMEI Number [closed]

I have lost my phone and I have a IMEI number of it. However, the guy removed my SIM card. Is there any way to track who is using my phone?