Questions tagged [encryption]

Encryption is the process of transforming information to make it unreadable to anyone except those possessing special knowledge.

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32 views

Is the data on flash memory encrypted or unencrypted?

I understand there was full disk encryption from Android 5.5 to 9. Not sure it was ever the default, and not sure what the default is now. I've bricked a Pixel 3 running Android 11, and I want to know ...
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Why does encryption doesn't work/apply to access device storage or Google photos or drive when we upload a file from device/cloud to any webpage/apps

Example : YouTube, Facebook, Instagram, Chrome ( any app ) If I'm accessing YouTube or any other app where I can upload content from Android device with or without the app lock features, whenever I ...
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Is date safe in encrypted phone without passcode

If my phone does not have a passcode, but is encrypted by default, and I factory reset it, is my data safe? Or is there a way someone can decrypt it since it had no passcode
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Possible to have different passwords for device encryption and screen lock?

I'd like my device encryption password to be very long and complicated but a short screen lock password for convenience. Is this possible?
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Password-Protected Notes Encryption

I have one question about the encryption algorithm used for password-protected notes. I am an Android smartphone user and for taking notes, I use my phone's native Samsung's note taking App. But, I ...
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Possible to perform data recovery with dead cpu? (LG G6 - Android 9)

I've got a dead LG G6, suddenly freeze during normal using. After force rebooting, it was completely dead even though connecting to charging cable. Have already performed cpu chip-off and reballing, ...
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Unable to mount fastboot boot twrp.img backup unable to mount storage?

I was trying to load fastboot boot twrp.img and take backup of stock rom system.img userdata.img through twrp recovery... it loaded successfully but while taking backup its not able to take backup ...
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31 views

Reset failed decrypts counter Android 10

I have a locked phone (forgotten PIN). And due to many incorrect attempts, the gatekeeper timeout or cooldown period is stuck at 480s. Is there any way to reset this failed decrypts counter, so that ...
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How to add strong encryption to an SD card so that I can access it both on my desktop and phone using open source non tracking offline tools?

The question says it all. So far I was able to find out Default android encrypted SD card can only be read by the phone or by a skilled hacker or their non open source tools There are tools that are ...
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189 views

Recovering data from Android 10 (forgotten PIN)

Long story short: I have forgotten the PIN to my Android device, as it wasn't being used for a while. Steps that I have tried/am trying/planning to try: Brute forcing - I have been trying to brute ...
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How to decrypt android adopted storage without the key?

I would like to know if there is any possible workaround for decrypting the adapted storage. I don't care about recovering my data because I've got the backup already. I tried formatting the sd card ...
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Does `adb push` put files in the DE (Device Encrypted) or CE (Credential Encrypted) storage?

Does the use of adb push put files in Android's DE (Device Encrypted) or CE (Credential Encrypted) storage area? According to the FBE (File-Based Encryption) documentation On an FBE-enabled device, ...
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84 views

How to disable Direct Boot Mode in Android 10 (Device Encrypted, Credential Encryption)?

I want to disable Direct Boot mode on my Android-10-based tablet so that no apps can start on-boot until after I enter my decryption password. Background: As of Android 7, FBE (File-Based Encryption) ...
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How to get a list of all apps that start in Direct Boot Mode (Device Encrypted, not Credential Encryption)?

I want get a complete list including all apps (including system apps) that are running in Direct Boot Mode, therefore they necessarily store their data in the DE (Device Encrypted) area (as opposed to ...
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Does GrapheneOS's Android 10-based releases use FDE (Full Disk Encryption)?

According to the ASOP documentation, it is no longer possible to use FDE and the user is forced to use File-Based Encryption Note: Devices running Android 7.0–9 support full-disk encryption. New ...
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118 views

How to use FDE in Android 10 (Full Disk Encryption)

How can I setup Full Disk Encryption in Android 10? According to the ASOP documentation, it is no longer possible to use FDE and the user is forced to use File-Based Encryption Note: Devices running ...
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How to set distinct boot and lockscreen passwords in Android 10 (full disk encryption)

How can I set a distinct password for: The Full Disk Encryption password (used to boot the device) The Lock Screen password (used to unlock the device) For security reasons, I use a 25-50 character ...
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174 views

The default Full Disk Encryption feature (known as Secure Startup on Samsung phones) is not working for me

In the past, with older Samsung devices, whenever I have enabled Secure Startup to fully encrypt a device, I have gotten an instruction to charge it to at least 80% and leave it plugged in, as it ...
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Miui's default file explorer's private folder encryption issue

I am no techie and no good with codes either but a good Scriptkidie if u suggest some work around for my serious issue here!! Hi everyone, I am on Android 11 poco x3p, recently I hide some image files ...
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Why isn't the unlock pattern working anymore?

A few days ago my unlock pattern was not recognized anymore. I'm guessing the cause is memory corruption or some bug. I haven't restarted the device yet, hoping to "find" the new pattern or ...
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41 views

Backup and restore file-based encryption keys

Android File-Based Encryption is implemented via fscrypt. How do you backup and restore fscrypt encryption keys? Both the master keys and the per-file keys would need to be backed up.
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If a phone is encrypted (Android 5.1) but user doesn't use a screen lock, and then does factory reset, is data secure?

If I have a phone running Android 5.1 and it is encrypted, but I don't use a lock/PIN for unlocking and using the phone, does that mean if if I do a factory reset, the data on the phone can still be ...
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How to resolve an encryption issue?

I used a lockscreen to encrypt my phone and accidentally messed up the system and TWRP. I've since formatted it and am using it normally, albeit without root this time lol. But, just in case, I made a ...
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26 views

Terrible SD card performance after enabling encryption

Device: Samsung Tab A7 2020 - purchased less than 1 week ago OS: Android 11, April 2021 patch Files used to test: three zip files totalling 613 MB Micro SD cards which have been tested: Unbranded 256 ...
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What method does Monospace use for encryption?

This application has the ability to encrypt. What method does Monospace use for encryption?
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96 views

Opening .sa files from old android(broken) to newer android

I have some *.sa files on my devices. These files which were saved by me are either images or PDF. But these files do not open with a photo viewer or PDF reader. So how to open and read files these ...
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Android SD card encryption

I was looking at some encryption standards and was wondering, what kind of encryption algorithm does Android's SD card encryption use? Is it AES 128 or a different algorithm?
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How to decrypt /sdcard | Keymaster HAL 4 | Unexpected value for crypto key location

-Update: Looked into TWRP log, and it seems like it has key problems: I:Setting up '/data' as data/media emulated storage. I:mount -o bind '/data/media' '/sdcard' process ended with RC=0 I:mount -o ...
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1answer
60 views

Is it possible to securely factory wipe a phone directly after encrypting it?

I would really like to make my phone more secure. But at the same time I want to be able to factory wipe it any time. I'm afraid that factory wiping could brick the phone/makes it unusable. So is it ...
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103 views

Does android keystore and “Clear data” of the “Settings” app are related?

I am working on a system app where i am storing some sensitive data in EncryptedSharedPreference. I realise that my app is not working as expected if I do clear data of android Settings app. That is ...
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194 views

XLOGGER on Xiaomi?

Installed simply file explorer on my pocket telecreener. Xiaomi MI 8 Pro, right now it running on unrooted MIUI 12.04 It happens that I have found a .log file, (completly by accident) with a hundreds ...
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175 views

Android device ro.crypto.state returns "encrypted", but I can access the /data partition. How?

I have a OnePlus 3 with an unlocked bootloader and LineageOS. I forget the PIN and I am trying to recover access to it, and I have access to the recovery. The data is encrypted. My understanding is ...
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How can I dump the fscrypt per-file nonce by getfattr command?

According to document of kernel about fscrypt: Filesystem-level encryption (fscrypt): Per-file encryption keys Since each master key can protect many files, it is necessary to “tweak” the encryption ...
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75 views

I recovered some encrypted pictures, but I can't decrypt them

My girlfriend lost all the pictures from our holidays. She has a Samsung Galaxy A70. She had an external encrypted SD card on it. I managed to recover the lost pictures, but they are encrypted. Do you ...
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495 views

F2FS partition does not mount, fsck.f2fs does not resolve. I want to recover the files

I made a backup of my phone's userdata partition with the command (because the /data is not mounting): dd if=/dev/block/bootdevice/by-name/userdata of=/usb_otg/userdata.img I need the files that are ...
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61 views

Samsung Galaxy Note 10+ 5G - cellebrite mobile forensics data extractions - locked with pattern

I've got a locked Samsung Galaxy Note 10+ 5G (running the latest android 10 and patches) The phone is locked with a pattern (unknown) What are my chances of any data extraction with cellebrite or ...
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1answer
201 views

Copy private key from OpenKeyChain to tails GPG?

I have a private PGP key on OpenKeyChain that I'd like to move to tails. There only seems to be one way to export from OpenKeyChain - choose to make the encrypted backup file? But I can't get the ...
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1answer
86 views

How to encrypt deleted data on Android 10

I'm running a custom ROM (MIUI xiaomi.eu 12.0.2/Android 10QKQ1.90910.002) and my phone is rooted. I want to encrypt my old deleted data (photos and videos) so that they can't ever be recovered after ...
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566 views

Clean LineageOS 17.1 install and empty device - can't work out how to mount data partition in TWRP?

I'm installing LineageOS 17.1 on my new phone. It works fine, but I can't get to data in TWRP. As usual, to install, I wipe everything, drop into TWRP, format (not just wipe) data, wipe cache/davlik/...
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437 views

Cryptfs : Unexpected value for crypto key location

Phone: Samsung S9 Plus, 256Gb OS: Lineage OS 17.1 (Android 10) ROOT: TWRP 3.5 I installed Lineage OS 17.1 on a Samsung S9+. It's been working fine so far. However, when I encrypt the OS from the ...
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My SD card got damaged [duplicate]

iam unable to format it not use it. i need an app that will help me recover my data please anyone can share light to this. Thanks in anticipation
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91 views

What can be done with a phone that has an encrypted bootloader

I am trying to get a rooted android phone set up for reverse engineering purposes. I tried to root two separate phones (SM-G925A and a Google Pixel 2) but they both turned out to have locked (meaning, ...
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Does Android disk encryption use device-specific keys (such as IMEI or model) to encrypt the disk?

This question is about how disk encryption for Android 6.0 works. In short: Does Android 6.0 disk encryption use any device-specific keys (such as IMEI or model) to encrypt the disk? In detail: I'm ...
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FBE encryption bootloader state in keys

I want to unlock bootloader on Android 8.0 FBE encrypted with PIN I don't wanna lose my data, therefore i made backup of userdata partition before According to CCC the bootloader state is part of ...
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Any way to root a crushed phone and get encryption file from it?

tl;dr Is it possible to root an Android 8.0 phone that is accessible only via USB? Is it then possible to extract encryption .key file out of it in order to decrypt its SD Card that was formatted and ...
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118 views

Forgot encryption password, too many wrong password attempts = wipe: Can I image my phone to "get more password tries" by restoring an image? [duplicate]

Forgot my Android encryption password, only have 10 tries left before data wipe, how can I backup my phone to get 10 more tries if I don't manage to find the password within 10 tries? For context: ...
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1answer
94 views

Why I don't need to provide boot-time PIN anymore?

tl;dr: I have my Motorola Moto Z2 Play / A8.0 encrypted and I was forced to provide PIN during very early boot phase of my phone. Since about 1-2 weeks ago -- when my phone had a one-time accident of ...
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1answer
2k views

TWRP not asking me to enter password to decrypt

I need to restore from a backup. However TWRP stopped asking me for the password to decrypt. In the terminal emulator I tried twrp decrypt 1234 but got the error "Failed to decrypt data". ...
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269 views

Encryption: can't decrypt data after rom downgrade

I downgraded an Android 10 custom rom while I had encryption enabled (rom). Basically I dirty flashed a previous minor version of the rom via TWRP (with just a simple "wipe cache/dalvik"). ...
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107 views

Restoring the /data partition on Android 11 yields an unlockable phone

I have a Xiaomi A2 which went into a bootloop due to a buggy Android 11 OTA update. It's a bug in the update, and a lot of people are affected. My phone really had a rather vanilla setup (original ...

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