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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13
votes
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 ...
0
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1answer
375 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 ...
0
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1answer
824 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 ...
1
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0answers
52 views

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 ...
0
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5answers
8k views

Is it possible to perform a MITM attack with a smartphone?

Will be possible to perform a MITM attack using a smartphone? If yes, that is very dangerous. Is it really a danger attack? Shorted : Is possible to perform a useful MITM attack to a victim using a ...
1
vote
1answer
337 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 ...
0
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2answers
114 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 ...
2
votes
1answer
180 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 ...
66
votes
8answers
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 ...
1
vote
3answers
145 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 ...
0
votes
2answers
187 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 ...
0
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0answers
31 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 ...
1
vote
3answers
878 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 ...
0
votes
1answer
73 views

2-weekly cell phone (android) browsing to columbus . shortest-route . com

Last month I resetted 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 (...
1
vote
2answers
81 views

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 ...
1
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0answers
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?
1
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0answers
104 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 ...
234
votes
5answers
282k views

Is Telegram secure?

There is a new WhatsApp-killer application called Telegram. They said that it's open source and that it has a more secure encryption. But they store all the messages in their servers and WhatsApp ...
3
votes
1answer
194 views

(Theoretically) intercepting GCHQ's smartphone exploit

In the lastest Snowden interview, it was revealed that GCHQ used an exploit sent via SMS to gain access to smartphones, and that this 'exploit' goes unnoticed to the handset user. I was wondering if ...
12
votes
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 ...
0
votes
2answers
182 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 ...
0
votes
0answers
48 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 ...
15
votes
3answers
9k views

Cordova/Phonegap: RefreshToken in localstorage

I am (partly) following a tutorial to develop a cordova app, based on angularJS. The author stores the refresh token in local storage, which was said to be very bad practice in one of the comments on ...
1
vote
1answer
6k views

Should the MEID, PESN, IMEI1 and IMEI2 numbers be kept secret?

On my Huawei PLK-AL10, when I type *#06# in the dialer, a window named MEID_IMEI would pop up and display some random strings. Note that someone can get this information through the "Emergency call" ...
1
vote
0answers
517 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 ...
2
votes
1answer
189 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 ...
2
votes
2answers
3k 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 ...
3
votes
4answers
6k views

Is it possible to jam just one persons Cellphone but keep all other working?

I know devices that are jamming everyones Cellphones in a radius of X meters but this is only distracting the frequency cellphones work on. This is not very handy. Is it be possible to jam just one ...
5
votes
1answer
7k 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 ...
21
votes
4answers
3k 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 ...
3
votes
2answers
243 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 ...
-2
votes
1answer
80 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?
2
votes
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 ...
55
votes
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 ...
2
votes
1answer
75 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 ...
0
votes
0answers
51 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.
-1
votes
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 ...
0
votes
2answers
93 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 ...
-1
votes
1answer
65 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 ...
0
votes
0answers
455 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 ...
1
vote
0answers
602 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 ...
2
votes
2answers
294 views

How much identifying information is in a photograph?

If I take a photograph with a smartphone camera, how much information is there that could be used to identify the owner? I know of Exif tags and that all cameras have slight manufacturing variations ...
-1
votes
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?
0
votes
2answers
229 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 ...
0
votes
1answer
1k 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,...
4
votes
2answers
8k views

Phone Hacked. How serious is it?

I was in an argument online with a guy and he sent me a fake youtube link. I clicked on it like an idiot and he asked me how my city is (he knows the name) and he knows my cable provider. Does anyone ...
4
votes
2answers
2k views

My cellphone is infected, and it keeps coming back

My Android smartphone downloads apps automatically without any interaction. Generally, the apps are known but some are unknown apps. I can only assume this is a virus/malware. So I decided to format ...
3
votes
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)...
1
vote
2answers
3k 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.
3
votes
2answers
252 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. ...