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.

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36 views

Who is this person in the right corner at the floor? [closed]

I know this question has little to do with security excuse me for this. I lost my phone. Because I want to track the person who now has the phone, I'm trying to contact my phone anyway. But I see ...
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1answer
169 views

Is Android encryption secure? [duplicate]

As far as I know Android (Pie) is encrypted by default with some hardware-based password. But how secure is this encryption? I am not talking about password compromise, but if somebody gets my phone,...
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It's possible to make an account in mainstream social media without giving them my phone number or have a phone number that can identify you?

I'm learning about privacy and security and one of the tips everyone always talk about is compartmentalization, I'm trying to do this and get rid of my old profiles in social media (one of them have ...
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160 views

How could a mobile banking app be hacked?

My phone got stolen, and sent back to where it was stolen a day after. At the moment of stealing, the phone was locked. When I received it back, there was no money left in my bank account. The ...
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Who/what is responsible for Disabling vs. Enabling WiFi Calling on a voLTE-connected iPhone?

This question arises from the fact that the following WiFi-calling lookup: https://e911-reg.tracfone.com/wps/portal/home, implies that a "SIM exchange" or a "WiFi-calling provisioned SIM" can enable "...
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6answers
14k views

Can a stolen Android phone with USB debugging enabled have screen lock bypassed?

My Android (8.0) phone was pickpocketed from me yesterday. It was immediately turned off by the thief and when I tried to locate it using Find My Device it shows as offline. As a programmer and a ...
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2answers
116 views

How are calls or SMS used to exploit a smartphone?

How could a phone number be used as a means to gain access to a smartphone? I am reading claims that you could receive a call or SMS on your phone and an attacker can install their malware that way. ...
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2answers
99 views

Is there any way to alter a caller's voice just enough to make voice recognition impossible?

I did search and found this post: Is it possible to identify mobile phone user with voice recognition It does not answer my question, however. Is there any way to alter a person's voice just enough ...
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10answers
14k 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 ...
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3answers
124 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 ...
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3answers
172 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 ...
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11answers
14k 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 ...
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3answers
461 views

Making transactions only, or almost only, by QR codes

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 payment card (debit/credit) free (using only application and/or cash)...
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0answers
118 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 ...
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1answer
2k 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 ...
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1answer
97 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?
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1answer
171 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 ...
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1answer
350 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 ...
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1answer
151 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 ...
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1answer
43 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 ...
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477 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 ...
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0answers
250 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 ...
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0answers
139 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?
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2answers
202 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 ...
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1answer
99 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 ...
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1answer
170 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 ...
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4answers
247 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 ...
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1answer
685 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 ...
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0answers
242 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 ...
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1answer
165 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 ...
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1answer
101 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 ...
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1answer
164 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 ...
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1answer
149 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 ...
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2answers
337 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 ...
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176 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 ...
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1answer
537 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] ...
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2answers
72 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
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1answer
109 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% ...
4
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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 ...
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1answer
217 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 ...
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2answers
2k 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 had to unlock it by pattern lock or password everytime I restart the phone and after unlocking by pattern/password, I ...
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2answers
1k 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.
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1answer
160 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 ...
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4answers
502 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 ...
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1answer
54 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 ...
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1answer
141 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
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3answers
5k 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 ...
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1answer
239 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 ...
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185 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 ...
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1answer
565 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 ...