Questions tagged [smartphone]

A smartphone is a mobile device which combines many of the basic features of personal computing such as email, media playback and web browsing, with the traditional features of a telephone.

Filter by
Sorted by
Tagged with
44
votes
9answers
11k views

Blocking people from taking pictures of me with smartphone

This question might be better suited for Skeptics, but I guess that those who can really answer this might hang around here. In the second episode of the fourth season of the french spy series The ...
2
votes
3answers
98 views

Can an app access location services when I turn off location services?

An app I'm using requires me to grant it the permission to track my location, which I grant. But, if I manually toggle off the device's location service (for example in the settings or the drop down ...
1
vote
3answers
126 views

Is a cryptographically signing camera possible?

What kind of digital / cryptographic signing would make it possible to create a camera that cryptographically signs the photos it takes so that the images can be verified to have been taken with that ...
73
votes
11answers
13k views

How to securely dispose of a smartphone?

How to dispose of a smartphone (it's an iPhone 5) at home? I was reading through this SE site questions and found this one which hardly applies here. Besides, I'd want to do it so that: It's not ...
3
votes
2answers
270 views

Going transaction-card free and making transactions only by QR codes by my Smartphone

I have a OnePlus 6 smartphone and I recently opened a bank account in a bank which seems to me very innovative in the context going transaction card (debit/credit) free (using only application and/or ...
2
votes
0answers
105 views

Hacked iCloud account: how can I protect my iPhone security?

My iCloud account has been hacked. I access links sent by hackers that compromise my iCloud account. The hackers don't have physically access to my phone, the compromised links are sent by them ...
1
vote
1answer
375 views

How secure is full-disk encryption technology on LineageOS, or Android phones in general?

We're attempting to assess the information security on our mobile devices, and information seems rather varied on the question of encryption. Is the encryption technology employed by Android-based ...
0
votes
1answer
81 views

On a mobile, does using a password instead of a PIN make encryption stronger?

On a mobile, does using a password instead of a PIN make encryption stronger? What key does the phone use for its encryption? Would it use the PIN itself?
4
votes
1answer
151 views

How can I securily use a pre-owned smartphone?

Is there a feasible way to safely use a pre-owned smartphone? For a PC/Laptop I would simply shred the contents of the hard disk drive before creating new partitions. If feeling paranoid, I might ...
1
vote
1answer
172 views

How to secure a smartphone left for repair?

I need to leave my phone at a repair shop. The reparation is not trivial, so I can't expect them to do it under my eyes while I wait. But my phone is all my life. Like for most of us (I guess), I ...
2
votes
1answer
120 views

Hide an app on Android

Is there any way to completely block anyone or anything from detecting an app that is installed on any Android device? Not from physically looking through someone's device but from google or any ...
0
votes
1answer
41 views

Protecting Android debug bridge that is connected to the internet

I have an android device which acts as a brain for my home security that has access to cameras, heat sensors, motion sensors and some appliances. I have enabled android debug bridge on my android ...
0
votes
0answers
214 views

Can a smartphone's PIN or password be brute-forced in an offline attack?

I know of exhaustive offline dictionary and brute-force attacks against any given online account, but can the same method be applied against phones, either Android/iPhones? Or would any such attack be ...
2
votes
0answers
136 views

How does the “Control Frame Attack” bypass the MAC-Randomization on Smartphones?

In this Study regarding MAC-Randomization of different Smartphone Manufactures on page 15 the so called Control Frame Attack is described. I'm not sure whether I understand this correctly. Are they ...
2
votes
0answers
127 views

Why don't smartphone manufactures write the IMEI onto one time writable ROM so that it can't be tampered with? [closed]

The title says it all basically. Even now, why is tampering IMEI possible at all? Shouldn't manufactures be using one time writable memory to embed IMEI into phones? Why don't they?
0
votes
1answer
140 views

Do smartphones have built-in surveillance in certain countries?

I recently was in a third world country which is know as a police state with heavy cyber surveillance. I noticed that brand new smartphones came in a box that had a nice holographic seal showing the ...
1
vote
1answer
74 views

Lock gmail access from a smartphone

A friend has broken his smartphone. It has (at least) three security issues: It is not protected by any PIN, password or fingerprint It automaticaly access gmail (I'm not sure if he just rememberd ...
1
vote
1answer
157 views

Can a smartphone get hacked even when off? [duplicate]

I've read that there are multiple batteries inside a smartphone, so even when you turn it off it can still communicate with other devices. So my question is, could a smartphone get hacked even when ...
0
votes
4answers
224 views

Can a hacker access smartphone data while locked?

Imagine you leave your smartphone in a hotel room for half an hour. Screenlock is on. Latest security updates are installed. How could somebody steal your data from the device given enough ...
11
votes
1answer
551 views

How was Walmart able to pop up an unsolicited “Rate your visit” notification on my phone?

I was in Walmart this afternoon, and later this evening I noticed a strange icon in the upper left of the home screen on my android phone. On examination, I found a notification ostensibly from ...
4
votes
0answers
179 views

Recent Pwn2Own baseband exploit

I've just stumbled upon the Pwn2Own Mobile news from three days ago. During which apparently several flagship mobile phones of several manufacturers have (again) been successfully zero-dayed, among ...
10
votes
1answer
159 views

How can faulty version of an iOS app (such as WhatsApp) expose the whole device to crashes or take-over

There was a lot of recent, prominent news about a security vulnerability in WhatsApp that affects also iOS versions of the app. The volnerability has been described as carrying the risk of an attacker ...
0
votes
1answer
100 views

Does the device you are logging into count as one of the factors for MFA when you are using device biometrics? [duplicate]

Yes it does because I 'have' the physical device I 'am' the owner of the fingerprint But no it doesn't because 1=>2 : If you have my device the fingerprint is now something you can get. Which ...
2
votes
1answer
115 views

Smartphone fingerprint plus iris scanning for login

I have often thought about the fact that when intimate relationship partners live together they eventually tend to sneak over your shoulder and gain access to your password on either your mobile phone ...
-1
votes
1answer
116 views

Cheap privacy oriented cell phones [closed]

What are cheap (<200 USD) and privacy oriented cell phones ? I am looking for the phones just for calling and sms messaging. I consider phones with and without operating system, or I can buy one ...
2
votes
2answers
298 views

Using a smartphone off the grid

I am planning to use a smartphone as a media player and maybe to read the occasional ebook or pdf. If I were to turn off all connectivity, e.g., bluetooth, wifi, gps, then remove the sim card and/or ...
6
votes
2answers
171 views

What are the circumstances in which it's not foolhardy to have access to your primary email address through your smartphone?

Most web sites I use allow a password reset through email; a few require two-factor authentication with a phone call or SMS. It would perhaps only be banking or major commerce sites that would require ...
0
votes
1answer
439 views

Smartphone app as a U2F hardware token via Bluetooth?

Quoting from agl's article from Mar 2018: At the time of writing, all Security Keys are based version one of FIDO’s “Client To Authenticator Protocol” (CTAP1). [...T]he core protocol [can be] ...
2
votes
2answers
70 views

Is there a risk in rebooting a smartphone while it's connected to an unknown USB port?

I rebooted my phone while it was connected to the PC and saw a notification about a failed device installation. Looked up the text and the code, and it turns out my phone exposes a certain way to ...
4
votes
1answer
106 views

Is it possible to ensure that firmware doesn't keylog? [duplicate]

Not a conspiracy theory, just a thought experiment. Let's say some big smartphone manufacturer put keylogger (or any other malware) in their hardware. Would it be possible to reveal it with 100% ...
3
votes
1answer
9k views

MTproto Proxy Security in Telegram App

In Telegram messenger, latest update, there is an option to set connection type to MTProto Proxy. Note: There is a detailed description by Telegram team on MTProto. Now telegram officially ...
0
votes
1answer
131 views

Can malware transfer itself between iPhone and Windows laptop? [duplicate]

I have an iPhone which I suspect was hacked. So, I have restored the iPhone using iTunes on my computer. When connecting my phone to my computer, can any spyware files transfer from the phone to my ...
0
votes
1answer
1k views

Why fingerprint scanner doesn't work after reboot on Mi phones?

When I first experienced this I ignored it. But after some days I noticed that I have to unlock it by pattern lock or password everytime I restart the phone. After unlocking by pattern/password, I was ...
0
votes
1answer
535 views

Is it possible to track a SIM card even if the cell phone is turned off?

I'm wondering if it is technically possible to track a SIM card inserted in a cell phone with sufficiently charge in the battery.
-2
votes
1answer
140 views

My android smartphone showing strange behaviour

Recently I am experiencing very strange behavior on my android smartphone such as: apps minimising/maximising unexpectedly suddenly it taps on other parts of the screen that I am not touching while ...
4
votes
4answers
480 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 ...
1
vote
1answer
50 views

Should smartphones with AI assistants be restricted for use in office?

New Galaxy S8 & S8+ provide Samsung's new AI assistant called Bixby. This thing was claimed to upload photos and voice records to somewhere. Is it a risk for company confidential information ...
-2
votes
1answer
131 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 ...
16
votes
3answers
4k views

Does disabling WiFi and mobile data make my phone impossible to hack online?

As I understand, a relatively outdated phone (Android 5, not updated for a few years) could be easily compromised by using security exploits through WiFi, mobile data, NFC or Bluetooth. I'm about to ...
5
votes
1answer
207 views

Is using desktop 2FA clients like Authy Desktop a good practice?

Basically 2FA relies on the idea that instead of just something you know, using a service also requires something you own. I am quite confident, especially when used on iOS (which has a better system ...
1
vote
0answers
169 views

Are there any good instant messaging applications with a good end-to-end encryption to its web application? [closed]

Whether an app like Telegram is secure or not has already been answered and it has recently been confirmed that it is not. Apps like Signal and Cryptocat have been recommended instead. But do these ...
1
vote
1answer
482 views

Assessing security tradeoffs with LineageOS on older Android phones

In setting up an Sony Xperia ZR smartphone manufactured in 2013 and running Android 4.4.1, I am working on understanding the trade-offs involved in loading the custom ROM LineageOS 14.1, which is ...
2
votes
1answer
829 views

Can a smartphone be accessed only by knowing its IMEI?

I have an old smartphone that I want to use only as a media player/portable radio/voice recorder. It doesn’t have a SIM card and it’s not connected to WiFi. I am curious however can the files on it ...
0
votes
1answer
140 views

Why must I register a new phone for 2FA services? The number is the same, isn't that enough?

I have a smartphone and I use 2FA to log in to several services - bank, github, world of warcraft, etc. If I were ever to lose/destroy my phone without making prior arrangements for account recovery ...
3
votes
2answers
331 views

I connected to an apparently password protected WiFi without giving a password

My partner and I have just moved house and we're waiting for our internet to be connected. We're living in a group of units and as you'd expect there are numerous WiFi networks, all secured... or so I ...
1
vote
0answers
389 views

Is there a phone/dial app could encrypt voice calls without using data network? [closed]

I know there are many VoIP apps could provide end-to-end encrypted voice communications, such as Signal, Telegram..etc. But I could not find one app could do the same by using regular non-data/non-...
7
votes
5answers
463 views

Can a smartphone strictly be viewed as the 'something you posses' factor for 2FA when it has no hardware token capability like smartcards?

It seems that 2FA purists seem to go for security keys (like ubikey or smart-cards) while others seem to have a more relaxt stance which even seem to include 'possession' of none physical elements ...
2
votes
1answer
1k views

Smartphone - Full disk encryption

For desktop computers / laptops we have software like VeraCrypt for full disk encryption. Say I have a smartphone which contains sensitive data like pictures, videos or even whole apps. I want to ...
0
votes
1answer
86 views

Can my smartphone apps that I am using be seen in the router? [duplicate]

If I am using apps on my smartphone can the network admin. see the apps I am using on my smartphone?
0
votes
2answers
73 views

Can someone find out what phone was used to send an email

Can someone find out exactly what phone/phone number an email was sent from? Say Doug used sallys phone to sign in and check his gmail account but never signed out then sally opened his gmail and sent ...