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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55 views

Can anyone tell me what this means?

I have a spy wear app and it's showing these have accessed my net but I dunno how to figure out what they are..the ones in the pic with ?marks by them when opened thats what it read on the other pics
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Is it possible to have shell access to Trusted Certificates

I have an Android Application that launches Python via JNI. Inside of Python I have web requets that I make, some need to be secure. I can configure the APK to be able to access a User CA certificate, ...
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How can I change my location on Tinder (free version) on a rooted phone?

Android 7.0. Using GPS spoofers doesn't seem to work. It works on Google maps though. I don't know what Tinder uses to know where you are but it's pretty good. How can I bypass it? Things I've tried: ...
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35 views

Better Protection for Login Data on Firefox for Android?

Across the Desktop, Android and iOS versions of Google Chrome and Android, Firefox for Android is the only browser that allows viewing the list of saved passwords even when a master password is set. ...
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1answer
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a sketchy person has my phone for half an hour. what should i look for? [closed]

Summary: what sketchy things, could someone do if they get your phone for half an hour. And could you do to find it out and protect yourself. Luckily, nothing happened for me.
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69 views

Forgot Authy password

I accidentally broke my OnePlus 5 which contained the recovery codes for my Instagram and Facebook, both were using Authy as their two factor authenticator. Thing is I apparently don't remember my ...
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31 views

Ensuring that a deleted file cannot be recovered

A few months back, I had deleted a media file from my gallery. My phone wasn't encrypted at this point. Now, I wish to ensure that this file cannot be recovered in any way. What is the best way of ...
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46 views

High battery usage (no wifi no apps no wireless)?

I've noticed that I lose about 20% battery each hour while my phone is unattended and offline. I check the battery settings and find that no apps are running. The phone is rooted, and I'm wondering ...
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730 views

Hide Wifi Password QRCode in latest Android mobiles

We are using Android devices within office network and these devices will be used by operators for daily day-to-day operation activities. Currently, these Android devices are connected to Office Wifi ...
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48 views

Can I install replicant on a Galaxy A10e without bricking it?

I'm trying to UnGoogle my phone for privacy/security reasons, and from one source I heard that if you want to use a smartphone, you're better off getting a Pinephone running GrapheneOS / LineageOS. ...
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275 views

Is Google Voice susceptible to hacking like regular MMS or Whatsapp messages?

I have been using Google voice in a public facing way so as to reduce the chance of receiving malware messages over SMS/MMS or Whatsapp. But is it just as susceptible for someone to be able to sneak ...
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1answer
6k views

What can class 0 message (flash SMS) do to Android devices?

I'm using a Samsung phone and I recently got an anonymous message via Class 0 Message Class 0 Message URGENT MATTER ,CONTACT ME MY EMAIL NOW (email redacted) From: (phone no. ...
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57 views

“System” is trying to access Internet

I am using OnePlus 3T, Android 9. Recently I installed an app called "NoRoot Firewall" to prevent the apps from accessing the internet. I explicitly allowed and denied access to internet for some apps ...
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45 views

Automatic downloads

I've noticed in several occasions that on mobile browsers (I suppose it happens also on desktop ones) downloads can be forced without user consent. I've studied the matter and I've learnt that this is ...
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1answer
226 views

Can a blocked contact see any number changes?

I would like to ask, whether a blocked contact will receive an information,if I change my Viber phone number? Is it possible to make the change by only informing a selected group of contacts or ...
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Constantly changing app “shortlist”

I have a shortlist of five app icons at the bottom of my home screen, usually Phone, Messaging, Chrome, Google and Camera. These tend to remain constant (I've not seem them change). When I swipe up ...
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128 views

Replacing Malware System Apps with Clean Versions of Apps

I have many times found devices or ROMs that have malware installed as system apps. This thread is intended to define a recurring problem and discuss and determine solutions. Background: In many ...
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1answer
166 views

how does disabling 'password at startup' works before file-based encryption?

Android 6 (before file based encryption): after encrypting device and setting screen lock, i can choose an option 'require the PIN, password, or pattern at startup' or can i choose 'no thanks'. in ...
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84 views

No permissions but still able to access storage

I'm kinda frustrated! The app has absolutely no permissions but still is able to access my storage (photos and files) on both Xiaomi MI 9T Pro and OnePlus 6 running Android 10 which is all about ...
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320 views

App from playstore run but same apk crashes on sideload install

On my noughat device, I have downloaded app from playstore, which is running great. Extract apk from install app, uninstall it and again succussfully install with package installer. But second time on ...
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48 views

Are there any downsides to encrypting an Android device?

Besides requiring a lock screen, are there any downsides to encrypting an Android device (using the native encryption)? For example: is there a performance decrease? is there a temperature increase? ...
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1answer
287 views

to identify these services after upg. to andr 10?

To all, please tell me if this is relevant to the forum. the problem: I want to identify these services that appear after the upgrade to Android 10, in adjustments -> applications and ...
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2k views

How to enable 'install unknown apps' on Samsung mobile device?

My Samsung device is running on Android 10, One UI 2.0. I want to install apps using apk file via non-official platforms (the app is not published on Google Play, Galaxy Store). But it won't let me. ...
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1answer
111 views

How are apps installed on Android ? context - symbolic links of only some apps disappear after reboot

I am using Apps2sd to move some apps to ext4 partition mmcblk1p2. It successfully moved 1 app ( see code below ) but after linking another , the symblink for app gets deleted but data folder's ...
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1k views

can't pass / unlock Secure startup with PIN code

I have a problem with my LG G5 (but saw it happens in other LG phones) I have a PIN screen lock and I changed it a couple of days ago. I was talking on the phone when it restarted (I remember the ...
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1answer
444 views

Can apps use USB communications without USB debugging?

This question is from a user's perspective, but it's about whether or not developers can accomplish this. I recently installed DroidCam to use my phone as a webcam for my computer. It works either ...
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26 views

Securely storing keyfiles with authentication and alike

I am using Keepass as my password manager. I am using a keyfile for securing access to my database. However when I want to do the same on my android phone I have to store the keyfile in my phone ...
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1answer
113 views

How does Android know my password contains only numbers?

My Android phone's unlock type is set to a password, but it only contains numbers for fast unlocking (I'm well aware that a PIN is an option, but this way presents more possibilities to an attacker). ...
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1answer
53 views

Can we stop Gmail from calling home to google before resolving a url?

When you click on a link in gmail on your phone, it first queries www.google.com with the url of your query, and then redirects to the destination URL. Is there a way to stop this "feature" of google ...
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75 views

How is it possible that I run android apps with the right user rights

I learned for every app I installed on my Android, a new user is created. And the data for this app is stored in /data/data/app folder with the only access permission to the user that is created for ...
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27 views

Why are certain functions permissible while others are not (from a security standpoint)?

You would think there must be some sort of logical convention or decision-making that leads to what is or is not permissible, followed by sanity checks against each functions' interactions for ...
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1answer
2k views

Android 9 pie see if device is encrypted

I am trying to figure out if my Android (Pie) is encrypted. Per Is there a way for a user to tell if their Android device is encrypted or not?, it says my phone will be reported as phone encrypted. ...
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1answer
750 views

FreeOTP or FreeOTP+ - Which is More Secure?

I have been using FreeOTP by Redhat/Fedora for a few years now as my main two way authentication app. However, I have realised that the current version (1.5) is quite a few years old (having been ...
2
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1answer
978 views

Why root cannot access “.android_secure” directory on external SD card?

I have an Android 9 tablet, rooted by way of Magisk. It has an external SD card mounted as sdfat on /mnt/media_rw/1234-5678 which is mounted on four other mount points, all as type sdcardfs, with some ...
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1answer
5k views

Suspicious notification from “Find My Mobile”

I just received a notification from Samsungs "Find My Mobile" service, without having triggered anything. The same thing happened to my work mate today morning. As I almost never use my Samsung ...
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7k views

Bypass Samsung Knox factory reset protection

I have an Android device supplied by my government for students and secured by Samsung Knox. However & unfortunately, I forgot the security pattern of the device and I want to hard reset it to ...
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138 views

What mitigation can I take for CVE-2020-0022 (aka BlueFrag)?

A vulnerability, CVE-2020-0022, was recently announced in some versions of Android. My phone, a Sony Xperia XA2, does not yet have an update available. What should I do in the meantime? The report ...
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1answer
322 views

How does rooting affect full disk encryption (Oneplus 3T)?

My oneplus 3T running Oxygen OS 9.0.6 (Android 9) came with full system encryption by default. I want to install root but also keep full system encryption. Will root disable encryption? Does root ...
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46 views

Can I uninstall preinstalled apps and reinstall them from Play store for enhanced security?

I'm reading Android Hacker's Handbook, and it chapter 2 it says: Applications are typically broken into two categories: pre-installed and user-installed. Pre-installed applications include [..]. ...
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724 views

How to block app silent installation

Recently I noticed I have opera browser installed. I definitely did not install it because I was sleeping at that time. I checked installation time and revealed it was the day before yesterday ...
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246 views

Set a password at boot before recovery mode on Android Q Huawei P30 Pro

on my old cellphone, I could set a password that was asked at startup to protect it I did not find any similar setting in Android 10 I need help to properly secure my cell phone in case I lose it
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484 views

Removing DRM from android using root

I would like to know what would one have to do to remove DRM (Digital Restrictions/"Rights" Management) completely from an Android phone one has root access to. So far I have thought about removing /...
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93 views

/system/media Directory

First of all, I am currently learning about Android security and wasn't sure if to post it on the Android or Security StackExchange, either way here is my problem... Investigating the content ...
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1answer
56 views

Is permission elevation still a security issue for end users when updating Android?

Is this still an issue for end users?: Researchers have determined that the Android update process has a vulnerability that allows permission elevation without user knowledge. Android allows ...
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1answer
408 views

What are possible consequences of not installing updates

I've a many-years-old android phone on which I've never updated the OS, never logged in to Google Play. I haven't had any google accounts for years. I deleted nearly all apps that came ...
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1answer
7k views

Android Verified Boot and generation of vbmeta image

I'm in the process of unofficial device bringup, and I'm stuck unable to progress due to Android Verified Boot. As per specification Android Verified Boot can be disabled with the --disable-verity and ...
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152 views

Understanding Secure Enclave (or equivalent) - Samsung S8+ SM-955F

I'm trying to understand the limits of the Secure Enclave (or equivalent, I'm not certain what its called) on the Samsung S8+ Specifically, does the secure enclave include any features related to ...
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1answer
495 views

Is it possible to encrypt system partition with custom rom?

I have galaxy s9 and i wanted to have lineageos rom. So i unlocked bootloader and wiped stock firmware of galaxy s9.And then i installed lineageos 15.1 with twrp 3.2.3-0 Then i encrypted phone. I ...
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1answer
3k views

SELinux permissive kernel - is it a security risk?

As in title. I am talking of Kernel, not ROM (plenty of questions dealing with ROM on this site). I have a OnePlus 7 running stock Android 10 and prefer a custom kernel. Of late, OnePlus hasn't ...
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2k views

How can I disable the official YouTube app's incognito mode?

Preface: A warning for parents If you want to protect your kids, disabling Incognito mode is usually not enough. If your kids are under age 13, it's wise to use a good filter to block the YouTube app ...

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