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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72
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7answers
25k views

How hard is it to intercept SMS (two-factor authentication)?

A lot of two-factor authentication mechanisms use SMS to deliver single-use passphrase to the user. So how secure is it? Is it hard to intercept the SMS message containing the passphrase? Do mobile ...
14
votes
2answers
2k views

Protecting cellphones from USB attacks (a.k.a. Juice Jacking)

We have several smartphone with encrypted data on them (BES, iPhone, Android) and want to prevent an unauthorized person from downloading information from the device via USB. The visual assumption ...
36
votes
5answers
70k views

How to trace a (mobile) phone?

Even since growing up, I've watched films in which the "bad guy" is repeatedly tracked down when they call the police or FBI or police force de jour. They always have "about 30 seconds". Regardless ...
18
votes
1answer
11k 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 ...
31
votes
5answers
16k views

Are phone calls on a GSM network encrypted?

When I make a call on my cellphone (on a GSM network), is it encrypted?
36
votes
6answers
26k views

What is preventing us from sniffing the mobile phone communication?

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 ...
22
votes
2answers
77k 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 ...
33
votes
5answers
20k 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 referenced a bug that could track/listen in on the subject "whether the phone was powered on or off," although that may have been ...
17
votes
3answers
2k views

Is my phone carrier monitoring my traffic?

Today I started using a VPN on my phone (nexus 5), and after I switched on mobile data and turned off my WiFi, I received a text message from my carrier offering me roaming packages for Europe (which ...
4
votes
1answer
22k 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 ...
4
votes
3answers
4k 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 ...
6
votes
2answers
904 views

How can I protect my phone voicemail from being hacked?

With the News of The World Phone Hacking scandal spreading globally amidst allegations that as well as celebrities, victims of September 11 and other major events in the news have had their phone ...
12
votes
2answers
38k views

How to spoof a cell phone tower (cell site, base station) — homemade IMSI-Catcher

An answer to a recent question has given me an idea for a school project (security CS program). Also, an active attacker (with a fake base station) can potentially force a mobile phone to use ...
52
votes
11answers
30k 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 ...
16
votes
3answers
70k 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 ...
26
votes
8answers
13k views

Do secure phone lines exist?

I could be out of context here about security, but , I would like to know if phone lines or phone calls over VOIP could be made secure . I know that Skype and other VOIP service providers have to ...
18
votes
3answers
603 views

Android security without updates

I have an android phone which, like many others, has quickly become unsupported and is not receiving any updates. At the same time there are publicly available exploits for privilege-escalation ...
7
votes
3answers
6k views

What makes the Blackberry device and network more secure?

One of Blackberry's strongest assets is the "network" that it uses. Can someone explain, or link to technical information that covers what this secure network is, and what it does better than the ...
0
votes
2answers
11k views

Why don't mobile operators blacklist stolen phones using their IMEI?

I've just read this piece of news that Android and Windows phones will get a 'killswitch', rendering them useless to potential thieves. However, since all devices have a unique identification number (...
5
votes
3answers
4k 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 ...
3
votes
2answers
3k views

SMS / voice call interception with a fake base station

This answer to a similar topic describes in a detailed way how vulnerable SMS and voice calls are in terms of decryption. In order to do so, an attacker needs to set up a fake base station located ...
1
vote
1answer
117 views

Suspicious phone call claiming MS Office not updated lately

I recently received two phone calls where the caller indicated that according to their log activity, MS Office has not been updated lately. They offered to help me get those updates. What kinds of ...
-1
votes
2answers
188 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 ...
5
votes
2answers
637 views

Mobile phone security eavesdropping based on data transfer

is there an easy way for particular governmental organizations (especially in countries where freedom of speech is a problem) have some technology where they can easily eavesdrop on cellphone internet ...
2
votes
1answer
532 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 ...
1
vote
1answer
508 views

PCI DSS - Recorded Phone Conversations

I am using the using the following image from FishNet Security as a sort of guide for the data flow diagram required by PCI DSS as defined by: 1.1.3 Current diagram that shows all cardholder ...