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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64 views

Can you listen to your last GSM call recorded when calling back a user?

My wife called a GSM/3G number abroad and the call was dropped. She called again and she could hear the whole conversation repeated with the other party but with blank period from her side of the ...
2
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1answer
74 views

Is it possible to locate a cellphone's location just by ringing it?

With today's technology, is it possible to locate a cellphone's location just by ringing it, kind of like what we see in movies?
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2answers
69 views

How to trace virtual phone number?

Suppose I received a call from internet with some virtual number, I called the same number back after few days but it didn't exist at the time or it was routed to some other user. Is there a way to ...
-1
votes
1answer
92 views

Can you make someones phone make a call with your phone?

Ive been called by someone, but when I answer the phone, it makes digital noises and then my phone calls some Nissan dealership. It will literally, after making before stated noises start ringing on ...
7
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4answers
474 views

airgap a smartphone?

im looking to use my smartphone purely as a portable computer, with no network functionality in order to protect my privacy, is removing the sim cards from it enough to airgap it or do i need to go ...
14
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4answers
383 views

Does two-factor authentication reduce the need for a long password?

I've recently enabled 2-factor auth on a number of web apps, mostly using Google Authenticator. Does this mean that the importance of a strong password on each site is reduced? I would prefer to use ...
1
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0answers
52 views

My Home Phone is being used to place calls to fax numbers [closed]

We are using Verizon's Home Phone Connect as a replacement for our AT&T landline. The problem is that somebody is using our phone to make dozens of calls each day to a series of toll free ...
1
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1answer
106 views

Why does not GSM use any stream cipher mode (OFB, CFB)?

If I understand correctly GSM uses A5/1 stream cipher. My question is why doesn't it use a stream cipher mode like OFB or CFB?
4
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2answers
464 views

Has there been any documented cases where hackers have hijacked the phone number to a business?

Has there been any cases where hackers have taken over the phone number to a business, by creating a phone number in the same area code, setting up a virtual PBX / Asterisk system, routing all calls ...
0
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2answers
164 views

PC showed evidence of a phone being attached for no obvious reason. Theories on why? [closed]

Connecting via remote desktop to a Windows 7 machine today showed the last couple of seconds of a windows device installing and the "Your device is ready" popup for a Sony Xperia T. Going to ...
2
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2answers
101 views

Intercepting business calls and forwarding them back to me

My sister recently went on a sales call and when she told them what company she worked for they were upset. They told her that the company she works for is stealing their customers by intercepting ...
3
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2answers
81 views

Sensitive data and phone calls

How safe is it to give sensitive information to someone over a phone line? Does it matter if the data was verbally spoken or if it was typed in? Example: Opening an account with an internet provider ...
5
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3answers
352 views

Which is safer, GSM or CDMA?

I have read in the past (no sure where) that unfortunately there exist illegal devices that permit crooks to eavesdrop on GSM mobile phone conversations. I recently also heard that some people had ...
2
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1answer
2k views

How to track a Spoofed SMS on Iphone

A mate pulled a quality prank on me the other day by sending me a SMS via a Spoofed number. He's bought a SMS gateway and can set the message ID/phone number to be 'God' (or whatever he wants(letters ...
2
votes
1answer
199 views

Can malicious phone software mount a MITM attack on a phone call?

Suppose my smartphone has been compromised and there is malicious software running on it. You can assume that the malicious software has broken out of any sandboxes and is running as root. If I'm on ...
2
votes
2answers
255 views

OFF Pocket or switch off your phone?

OFF Pocket: OFF Pocket is a "privacy accessory for mobile phones to block all signals". To use the OFF Pocket simply place your phone inside the case and close it. Your phone is now OFF. ...
8
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3answers
407 views

Is secure Caller ID possible for SIP / VOIP?

Is there any way (standard, proposed or draft) that will allow for secure Caller ID over SIP / VOIP networks? I have constantly heard that Caller ID is insecure when used over these services. Can ...
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1answer
72 views

Mobile Device Security [closed]

Are there any other security threats to a mobile device other then a rogue app? I am trying to secure a set of business phones and tablets and while anti-virus applications are possible, I don't see ...
7
votes
2answers
575 views

How do I forensically determine whether a mobile phone has been infected with a spy suite?

What is the best way of forensically determining that spyware software has been installed on the phones without making any changes to the phone(s)? I have Blackberry and iPhone 4 phones that are ...
3
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2answers
148 views

Degree of Obfuscation

Let us assume that I have the following code: namespace MobileApp { public class Storage { public Storage() { } public bool Save() { bool ...
2
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1answer
237 views

How to identify call stats about 2/3/4G users in a room?

If someone can please provide some advice about the following problem I am trying to solve it will be great. Scenario: A standard office room, with (say) a couple of people in it What I want to find: ...
0
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0answers
338 views

Is it safe to connect mobile devices to rental cars? [duplicate]

Many modern cars feature Bluetooth connections and USB ports that allow passengers to connect them with mobile phones and digital music players (and smartphones, which serve as both). Is it safe to ...
2
votes
3answers
6k views

Can viruses transfer from phone to computer over the network?

I don't know if this is the right place to ask but I heard that adult websites (porn) had viruses. I used to look up porn on my iPhone (I won't anymore) and I understand that there aren't viruses for ...
0
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1answer
363 views

Tracing nuisance or malicious cellphone calls

Is it possible for an ordinary citizen to trace source of nuisance calls to cell phone when caller ID has been blocked?
17
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2answers
2k views

How can I spoof a phone call and make it appear to come from another phone?

I'm performing a penetration test against a company. Part of my social engineering procedure is to contact the IT department and try to convince them to that I'm an employee in the company and get ...
13
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2answers
10k views

Is it possible to make a phone call appear to come from another phone, even to the network provider?

Quick Question Is it possible that I could call a mobile number, but have the call forwarded through another number active on a different phone that someone else has? I have had unlimited access to ...
17
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3answers
2k views

Could my bank's two-factor authentication be hacked?

When I attempt to log in to my bank, an SMS code is sent to my phone. I then type this nine-character code into the bank's Web site, to login to my account. Is this vulnerable to attack, without ...
10
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2answers
4k views

Are phone calls on a GSM network encrypted?

When I make a call on my cellphone (on a GSM network), is it encrypted?
3
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1answer
99 views

Windows Phone and Hardcoding Values

Let us say that I have a Windows Phone application. If I hardcode a private key in the Windows Phone application, can people extract it once the application is released to the public on the Windows ...
3
votes
1answer
93 views

Voice Call Safety

When i was dealing with an assistant of my bank through mobile call, she asked me to insert my bank login code after a beep. I was wondering if this procedure is secure against a malicious agent who ...
16
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2answers
23k views

Can Android phone running without SIM card be tracked (localized) by police?

I am running an Android phone without a SIM card. I am using it for web surfing. Can the police localize my phone using the cell towers (BTS)? In other words, I know Android phones emit radiations ...
4
votes
2answers
118 views

Options for simple phone verification with pin delivery

My website needs to verify phone numbers in order to ensure that customers claiming a business actually work there. The service calls and gives the customer a pin which they put into the site. Many ...
5
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3answers
291 views

Mutual authentication for humans

Is there any way for two people to securely authenticate each other without access to any special software (like PGP)? For example, when speaking over the phone or by sending SMSes to each other or ...
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votes
1answer
153 views

Is There a Premium Rate Phone Check? [closed]

Is there a way, online or otherwise, to check if a phone number is a premium rate number which will charge my bill? It seems there should be some way to do this with certainty. Can phone numbers be ...
6
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2answers
247 views

Can a SMS recipient charge any arbitrary fee to the sender without approval?

I received an email from a prospective "client" in broken English. We have been going back and forth about services for a while and he wants me to text him. Is it possible for him to charge me some ...
5
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1answer
118 views

Symbiote Counter-Attack Detection

I saw this video on YouTube about hacking Cisco phones (and other embedded systems) and I was overjoyed when the presenter not only hacked, but presented a security solution. Intrigued, I started ...
5
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5answers
967 views

How should I safely display my phone number on my Website?

If I display my email address on my Website, I would probably receive a lot of Spam, so I can set up a contact form instead. If I want to display my phone number, how can I prevent unwanted phone ...
1
vote
3answers
921 views

How can hotels securely receive your credit card details (for a custom, one-off payment)?

A hotel belonging to a large chain (400 hotels in 60 countries) has just requested me to send my credit card details via standard (unsecured) email. I have negotiated a deal for accommodation with ...
40
votes
10answers
6k views

If someone asks to borrow your phone to make a call, what could they do?

A stranger walks up to you on the street. They say they lost their phone and need to make a phone call (has happened to me twice, and maybe to you). What's the worst a phone call could do? Let's ...
3
votes
1answer
589 views

Does a TMSI change often enough to prevent tracking?

A company called Path Intelligence has a product called Footpath which uses the TMSI, WiFi MAC address, and bluetooth MAC address to track phones as they move through stores. However, I don't see ...
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0answers
51 views

Do the popular smartphone operating system have a cryptographically secure random source? [duplicate]

Possible Duplicate: Do mobile OS’s provide crypto-quality randomness? Linux and Mac OS X has /dev/urandom, Windows has CryptGenRandom. Do iOS and Android have a similar way to generate ...
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1answer
356 views

Extremely suspicious phone call — what to do? [closed]

Two days ago, I received a call. Someone with a female, possibly asian voice asked "are you using your computer in internet right now." I said "yes", then asked "who are you?". At this point, they ...
3
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2answers
24k views

Can a SIM card be tracked without cell phone and battery?

I have a SIM card alone without cell phone and battery. Can it be be tracked?
5
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2answers
1k views

How do I protect my Gmail account when accessing it via an Android smartphone?

I have a Gmail account that I also access via an Android smartphone. The mail account could be used to reset passwords for other online accounts, so I want to tighten up the security around this ...
0
votes
1answer
906 views

Are phone calls normally recorded? [closed]

A person borrowed a cellphone and made a prank call and the following day the police contact the owner of the phone. The constable said "I can pull your call logs and you would have no say in it". My ...
2
votes
1answer
177 views

Which mobile phone OS implements or plan to implement data protection using keys derived from passwords per NIST SP800-132?

NIST has released Special Publication 800-132: Recommendation for Password-Based Key Derivation which is meant for protection of stored data using encryption keys derived from user password. This ...
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3answers
2k views

Tracing an IP from a mobile broadband ISP

My honeypot caught a hack attempt from an IP that was issued by Three Mobile Broadband (UK). My immediate thought was that most probable explanation was that the user was in the UK and had his ...
25
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5answers
10k views

What is preventing us from sniffing the mobile phone communcation?

I'm learning wireless penetration testing. It really is amazing. But it made me wonder, what about mobile phones? They are also means of wireless communication. So, our entire voice must be in the air ...
3
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2answers
182 views

Why is location very highly secured info on smartphones?

I can understand that an app needs explicit permissions to access it if the smartphone has a permission system (e.g. Android, Windows Phone). But how does location get so much intention than others ...
18
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4answers
8k views

Can A Powered Down Cell Phone be Turned On Remotely?

I know this is tin-foil hat fodder, but at least one judicial opinion (http://www.politechbot.com/docs/fbi.ardito.roving.bug.opinion.120106.txt) referenced a bug that could track/listen in on the ...