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Questions tagged [security]

For more generic questions relating security issues. For specific issues having their own tags, please use those -- e.g. 'malware', 'antivirus', 'privacy', 'lost-phone'. Please see the full tag wiki for more. For more in-depth Android security issues, you might rather want to visit our sister-site at http://security.stackexchange.com/questions/tagged/android

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22 views

Service Tests - Security - what do the settings mean?

I have been shown how to use a code in the dialer to access the Testing menu on my Sony Xperia. I believe that checking the settings in Service Tests/Security can reveal whether the phone has been ...
3
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3answers
76 views

How to find out stolen phone of android by using IMEI number?

I have already tried by finding findDeviceWebsite Is there any way to find device by IMEI number?
3
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0answers
37 views

FBE - Why does each user get a separate DE key

I've been reading about how File-Based Encryption and Direct Boot work. There's one thing I don't understand. According to https://developer.android.com/training/articles/direct-boot Device ...
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0answers
25 views

Running an Android app in an encrypted container

Is there a way to encrypt apps (and appdata) on an Android device. I use an Android 7.1 device and don't want that there is any APP or especially Malware which can spy on appdata like my WhatsApp data....
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0answers
28 views

How do I verify my second-hand phone is 'clean'

I have just bought a second-hand Android phone (Samsung) and would like to check that there's nothing nasty on there before I start using it in earnest. It's my first smartphone! I have some ...
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1answer
45 views

malicious software runs on the background of android phone cannot see it - how to find and remove?

I know that a malicious malware / spyware has been installed on my galaxy s 3 phone and I constantly get the message to close apps not in use because they drain my battery. But I do not have anything ...
5
votes
1answer
63 views

Should a certificate be installed when a browser offers to install it?

I was accessing my internet banking site, and I found my browser asking to install some certificates noted some extensions of certificate. Do I need to install certificate to access the site safely ...
4
votes
1answer
55 views

Prevent application to make silently install file(s) or making changes

'Request Install Packages' let's say if an app has this permission ex- facebook(Check it in playstore head to facebook then 'app permissions' and click 'see more'. I used to read articles related to ...
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0answers
16 views

Parental Controls on a Kindle Fire

My mom put parental controls on my tablet and when I try to reset it my Kindle powers off. I do the "entire enter the password wrong and the click the blah blah blah" and when I enter my password and ...
2
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3answers
49 views

control per app internet (non-rooted) while using actual VPN?

I am trying all sorts of (non-root) security software that allows me to block internet for apps. so far every one needs some kind of fake VPN to gain access to traffic, I guess so no root is needed. I ...
1
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0answers
41 views

gboard suggesting passphrase after deleting app data and learned dictionary

I have been using the gboard keyboard app for as long as I can remember. I also use password managers for nearly every situation, but they do not completely eliminate passwords. To my horror, gboard's ...
0
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1answer
115 views

What are the risks involved in unlocking the bootloader?

A locked bootloader is one that will only boot an OS and recovery that it "approves" of. Vendors digitally sign the recovery, kernel and kernel modules and unsigned binaries are refused to flash and ...
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0answers
69 views

Can not re-sign Android system app without app crashing (using LineageOS)

I have re-signed all system apps of LineageOS with my own key and have replaced them all before the first boot. LineageOS boots normally but then all re-signed system apps crash with an error like: ...
2
votes
0answers
91 views

Unlock with fingerprint instead of PIN after Device reboot or Device Locked by admin

Android has a security feature that requires the user to input PIN/Pattern/Password if the device was locked by an app using the Device Administrator permission or when the device is restarted. ...
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0answers
29 views

Is it possible to make Android remember the SIM PIN and automatically unlock the SIM upon reboot?

This way the phone could be unlocked and used with the visual pattern. (Or some other mechanism, e.g. fingerprint, face scan, etc.) The SIM card PIN wouldn't have to be repeatedly input after every ...
2
votes
2answers
113 views

How can my employer change my Andriod security settings?

I got the following email from my employer: Passwords required on all mobile devices In order to protect College data stored on portable devices, from Tuesday 20 November ICT will enable a ...
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votes
1answer
307 views

What are “minuhome.Black.[…]” apps?

I've downloaded an app locker on my Samsung Galaxy Note 8, and as I was trying to import apps to the locker, on category "M" of the app list comes out a lot of Android icons with the file name of ...
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0answers
33 views

Are non-Google emails stored only locally when using the Gmail app? [duplicate]

The Gmail app allows to add non-Google email provides (via POP and IMAP). Is it mentioned somewhere that the emails pulled from these providers stay on the device and are not stored/shared with ...
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0answers
28 views

Working with Security Metadata in APK file

According to this Blog post, Google has added a Security Metadata on top of an APK to verify that it was originally distributed by Google Play. More specifically it adds APK Signing Block to the APK ...
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votes
0answers
39 views

Can a tracking software be flashed to the ROM?

Assuming to have a rooted phone (and not caring of loosing warranty), what could be flashed to an Android device ROM? I see tracking apps on Android being not so useful since they won't work when: ...
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0answers
38 views

Why Clock app has User Data set to such high amount?

I am on Android 9 (Oxygen OS beta 5), my Clock app uses strangely high amount of User Data i.e : 129 MB, why is that? Screenshot: Should I be worried?
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0answers
32 views

Enable IPSec on Android configuration [duplicate]

My goal: I need to enable IPSec on Android. So My Question here is: I want to know what is the difference between configuring IPSec on Linux vs configuring IPSec on Android, if any? (If possible, I ...
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0answers
73 views

Enable IPSec on Android

My goal: I need to enable IPSec on Android. I want to know how to configure ipsec-tools/racoon properly on android. So My Question here is: I want to know what is the difference between configuring ...
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0answers
18 views

decrypt remember password from android pdf reader

Firstly, i have an local books selling app that can buy many local books.if you are rooted, you can extract pdf easily.But problem is that books are protected by password 128 bits AES(cannot recover) ....
2
votes
0answers
36 views

Security related concern for my android phone

i purchased an android mobile and had my google account set up but the device later went faulty and would not turn on, so now I got the same brand phone exchanged. meanwhile I have also set up my ...
0
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0answers
239 views

Make Google Pay require unlocking for NFC payment?

I have installed Google Pay and NFC credit card payment is neat. However, I don't feel safe about it. What if someone snatches my phone, then pays with it before I notice, or after I notice but before ...
0
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0answers
51 views

In Android, got click-jacked into clicking “Allow” for a pop-up that flashed for 0.1 seconds. How do I find out what I allowed?

In Android, I was using Google Chrome. I clicked on a sketchy website which popped up a new chrome tab. I pressed the tabs button which caused me to view the various tabs. Right as I was clicking on ...
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0answers
34 views

Create a private folder in Android: set the SELinux attribute of a folder in external storage

There are quite a few apps that require read and write access to the external storage, which gives them access to the whole /sdcard directory. But since that is also the only storage the user ...
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0answers
24 views

Popping certificate notification of arubanetworks.com

Whenever I use certain public wifi-network on my Android Nougat I get this pop-up about certificate security. Even deleting the account from email client didn't help, it seems it relates to system ...
0
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0answers
30 views

KitKat exploit for reading fils in /data

My Motoroa Droid MAXX is running a version of Android that has no rooting method. All I want to do is read Chrome's backed up file of tge list of open tabs. Does Android 4.4.4 have any known ...
0
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0answers
46 views

How do I prevent a thief from Hard Reset or Flashing a new ROM to my phone?

My Android phone was stolen a year ago, so now with any of my future phones, I want to istall armour plated security on it so that if any thief gets their monkey hands on my phone, it is rendered ...
1
vote
0answers
569 views

When I click “enable secure and erase” in Find My device it says “request sent”, but nothing happens

I'm trying to enable remote locking and wiping for a phone. When I go to https://www.google.com/android/find and click on “enable secure and erase” then it says "request sent", but I see nothing on ...
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0answers
210 views

How can I disable screen lock disabled by device administration app

I have outlook account configured on my android which need administration access. It enforces me to have pin or password lock and does not allow no lock and pattern lock. Is there way to use this ...
0
votes
1answer
39 views

How to disable sending all sensible information to the cloud?

Recently I found, that my Samsung Galaxy S7 was sending all my photos to Samsung without my explicit permission. I would like to ban any such activity from any application. Is it possible to do this ...
0
votes
1answer
46 views

Does syncing gallery means sending all photos to internet?

I found with fear, that my Gallery on Samsung Galaxy S7 was set up to sync with cloud by default. Does this mean, that all my photos, including secret ones, were silently sended to Samsung??????
0
votes
1answer
2k views

How to Disable FLAG_SECURE without root?

I just realised the only way to bypass screenshot security on certain apps is to disable this FLAG_SECURE, which as I see can be done using Xposed module. But I don't want to root my phone. Is there ...
2
votes
1answer
347 views

WhatsApp: How to isolate contacts and photos - Privacy concerns

Whatsapp is ubiquitous and is commonly used despite the long scary list of permissions it seeks ( see Help understanding Whatsapp's permissions ) Privacy and security conscious people would like ...
0
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0answers
47 views

Security - Samsung official service forces ROM reflashing after battery replacement - how can I make sure that the ROM is 100% clean/stock?

I have a Samsung Galaxy S7 whose battery got a little bit worn. I want to replace it under warranty, but I'm a bit reticent because the official Samsung service will also reflash my ROM/firmware/etc, ...
0
votes
2answers
214 views

Are device administrator permissions a security risk?

I would like to use t-igra's SwipeLock+ app, but it requires device administrator permissions. Google Play Store lists the following permissions: receive data from Internet view network connections ...
5
votes
1answer
459 views

How does an app reads an OTP SMS without SMS permission?

I have recently installed an Android app from the Play Store. While registering in it, I realized that it was able to read my message of OTP without even asking for my permission to read the message. ...
0
votes
2answers
307 views

How do I remove Trojan horse virus from my android smartphone?

There is a virus in my android phone named com.wgjvp.idck and I tried every possible solution to remove it but couldn't find any solution. What I did: I hard-reset(factory-reset) my phone twice but ...
0
votes
0answers
22 views

Is there a way to only allow certain certain users to access the ADB of my device?

We have an Android tablet that we use for debugging at our office with the ADB over the 5555 port on 24/7. Since the device is always on, the IP is does not change and can be accessed by anyone who ...
1
vote
0answers
69 views

Does Google has a page where they show when an Android version isn't supported anymore?

We are in doubt of supporting a device running an older version of Android. I looked everywhere on the internet, but there seems to be zero information from Google how long they will make security ...
0
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1answer
98 views

Prevent google backup of contacts?

I have Google backup turned off permanently, however my contacts are still backed-up somewhere to Google cloud. I discovered that yesterday from another device that offered me to recover my contacts ...
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votes
1answer
46 views

A way of doing secure data exchange in Android?

To my knowledge, all current Android apps with internet permission enabled are prone to apps stealing data. For example, if you have a messaging app, all your messages are readable by the company ...
0
votes
0answers
15 views

How to delete-protect a folder itself but not the content in sd card stalled in android

Say I have an SD card mounted in android 6+ run mobile phone (samsung j2-2016). In the SD card I have folders created based on themes e.g. documents, videos etc. Each of these folders have further ...
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0answers
83 views

Can a Whatsapp account be spoofed?

I've had a big privacy concern lately regarding the safety of my Whatsapp account. Ever since my phone was stolen from me and returned by certain malicious individuals, I've had the weirdest feeling ...
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0answers
34 views

Using only w-ifi without cell network or data

Is there a way to get text messages even if you aren't near a cell tower of any kind and only have wi-fi. As far as I can tell, I doubt you can't make use of wi-fi calling without using some text ...
4
votes
0answers
115 views

Android phone lost, Data wipe after password change

Here's an urgent situation regarding phone robbery: My android phone (note 8) gets robbed and as far as i know it has not lost its way to some general person. It was robbed by force, so people ...
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0answers
23 views

Can a virus in my pendrive be potentially harmful to my phone after connecting the pendrive via OTG?

I have virus in my pen drive (later detected by antivirus in PC) and i used it in my android phone (Oppo F1s) through OTG before removing virus it can be harmfully for my phone?