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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9 views

How to text people who have stopped using Signal? [migrated]

I have a few friends who started and then (unfortunately :/ ) stopped using Signal, opting to go back to regular SMS. Now, however, when I text them (I use Signal for default SMS as well!) they don't ...
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2answers
303 views

Will Google Authenticator stop a sim-swap attack from compromising my Coinbase?

If I use Google Authenticator for Coinbase, and someone sim-swaps my phone number and gains full access to my email account, can they drain my Coinbase account? They would be in control of my email, ...
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2answers
227 views

Is it possible for someone to spy on an Android phone without using spying apps?

Can a “bad guy” spy on an android phone without installing spy apps (those apps that require payment)? By “spying”, I mean using key logger, screenshots, read messages and so on. Is it possible to spy ...
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1answer
441 views

Why don't researchers care about iOS malware? [closed]

I see Android malware being mentioned when reading peer reviewed papers about malware detection for smartphones, but iOS is never mentioned. Even Malwarebytes says: Historically, iOS has never been ...
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Android System Update Spyware Can Steal Your Photos, Money, Record Calls and Track You Too. What to do if this happens? [closed]

I came across this website and suddenly I got worried. What worries me is apart from the system update threat mentioned I have been visiting so many sites, clicked on pop-ups, downloaded apps from ...
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6answers
5k views

2FA: Why do I need to keep my backup codes for each platform on paper?

I'm looking into setting up 2-factor authentication for my registered accounts. However, when setting up 2FA, for example Reddit, you need to write down backup codes in order to regain access to your ...
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3answers
167 views

Reccomended way to securely erase SSD storage of a smartphone? [duplicate]

As far as what I understand there are different approaches and I have a few doubts regarding each of them: On the one hand, it seems that factory reset does not securely erase itself data from SSD ...
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36 views

Smart Tablet Device Vulnerabilities

My son and I have a cybersecurity concern. Somebody somehow compromised his tablet, accessed his files, and emailed them to him from something like guerrilla mail but we cannot figure out how. Our ...
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2answers
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Are there any risks involved with plugging smartphones into Windows 7-10 computer's USB ports?

When you plug a smartphone into a USB port on a Windows 7-10 computer, often a small message box pops up on the Windows device indicating that drivers are being installed. This happens automatically ...
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56 views

Can android spyware access photos of my phone

I have installed some mod apks on my phone few days ago and i am feared that if they contain any type of spyware then can they access photos of my phone?
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2answers
143 views

Do android spyware apps comes attached with games or mod apk files?

I have installed several mod apps of Netflix, amazon prime, games apk from google in android v10. Can spyware be installed through these apk. these apps have not taken much permissions from me they ...
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124 views

Should I occasionally replace my SIM card for security reasons?

To be able to use mobile data (e.g. 4G/ LTE) and mobile telephony (e.g. VoLTE) services on my smartphone, I need to put a SIM card into my smartphone (I know embedded-SIM/ eSIM exists but let's ignore ...
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1answer
3k views

Secure way to hold private keys in the Android app

What would be the most appropriate way to store private keys for barcode signing in the Android app? Probably most experts here would say - just don't do it, cause it's insecure... But I would like to ...
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2answers
402 views

Can an android phone that is flashed to a trusted safe rom still be malicious?

I'm in the market for a new phone. The cheapest ones with decent specs are from China. Unfortunately I've read articles of phones sending data back to China for spying purposes. The phone I am looking ...
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0answers
50 views

Trying to defend against Cell site simulators

I take a phone, insert a SIM Card in it, then connect it to the internet. Then I switch on Wi-Fi Hotspot on it. Then I connect a second phone to the Hotspot of the first phone, and use this first ...
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1answer
206 views

'Removing' telecom provider from my phone

Baseband Processors have very weak overall security(closed-source firmware, no audits etc.) It also gives the telecom operator very high privileges on a mobile device. So, now I use 2 phones. First ...
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636 views

Can someone impersonate you on WhatsApp?

Well I'm not a developer so I'm here to resolve a specific question. I have been investigating this subject for a while now and I need and opinion from experts or developers which really understand ...
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1answer
1k views

Security and privacy concerns about “IMEI check” websites

I know there are few questions about the risk of IMEI with various answers from rare risk to none. But my question is regarding the kind of websites that provide IMEI check services for free with some ...
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2answers
235 views

Android phone's lockscreen PIN disappeared?

I own a ZTE Axon 7 (model 2017G) that I purchased secondhand from a reputable vendor in Germany ca. 3 years ago. The phone has been working well, and I updated the OS to Android 8.0. manually earlier ...
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1answer
95 views

Bi-monthly Android traffic to a URL getting blocked

Last month, I reset my cell phone, also immediately installed Malwarebytes and Avast. Every scan until now was/is safe. But I also have a virus scanner which is included in my ISP safety package (...
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1answer
82 views

Can your phone get hacked just through your phone number? [closed]

If someone has got your phone number can they hack into your phone using just the phone number? Perhaps by sending an SMS?
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3answers
1k views

Signal: contact people, or have people contact me, without revealing phone number?

Is it possible to use Signal without revealing my phone number to others? I'm personally using the Signal app on Android, but of course it applies to all versions, desktop and mobile. With Telegram ...
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1answer
40 views

What additional privacy impact does using the COVIDsafe app have for people in Australia who are using their phones normally?

I've been trying to encourage some people I know to install and use the COVIDsafe app. Some people have raised privacy concerns as a reason to not install the app (there's other concerns, such as it ...
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1answer
86 views

how to protect smartphone data against theft?

i assume typical android has fully encrypted disk with a key stored in a header. header is encrypted using pin / pattern / fingerprint or not encrypted when there is no lock. is that correct? when ...
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10answers
12k views

Does the saying “physical access = game over” apply to smartphones, too?

I was surprised to read in the responses to this popular question that it's considered nigh impossible to secure a computer system if intruders have physical access. Does this apply to smartphones ...
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58 views

How can you spoof your caller ID? [duplicate]

How can I spoof my caller ID to make it look like someone else is calling for pen testing purposes. Note: I tagged Python because I am trying to make it with Python.
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1answer
51 views

Why computers accept biometrics as first authentication but not phones

After powering on laptops and desktop computers, you are allowed to use biometrics for login. But, as far as I know, biometrics are not allowed for unlocking phones after powering them on. You are ...
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2answers
106 views

How can I make sure my master password is as strong as possible?

How can I make sure my master password is as strong as possible? The password manager I'm using is Bit Warden. Is creating a passphrase a good idea? I know it's good to include characters, numbers ...
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1answer
66 views

Can cellphone packets be read by someone who only has your phone number?

I got an IM from a person I recently got acquainted with this year. In the text message, he asked me if I knew the name of the website you download free ebooks from (libgen.is) I found it really weird ...
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0answers
499 views

Android 10 downloaded suspicious files without my permission

This is my first question on this forum so please let me know if I need to clarify anything. My Android 10 Pixel 2 just downloaded 2 files without my permission today, both named something to the ...
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1answer
86 views

Are the locations text messages are sent from logged?

When you send a text message from a phone with a sim card, is there a log which records your location at the moment, or any other information? is it linked to the phone? to the sim card? to both?
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1answer
2k 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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2answers
247 views

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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614 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 ...
66
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8answers
15k 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
289 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
106 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
16k 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
644 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 ...
2
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3answers
566 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
18k 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
467 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
146 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
8k 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
126 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
222 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
670 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
236 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
87 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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0answers
798 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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