General :: Backup Of Disk Encryption Master Key - Google Nexus 4
Jan 23, 2013
I have a Google Nexus 4 (rooted, of course) and I'm using the native phone encryption.
There is some information that can be found, revealing that google uses the native linux dmsetup tool for this.
Now, just in case anything goes wrong, I'd like to have a backup of the encryption master-key,
that I could use to restore the dm-crypt header.
On a normal linux system, this would be easy, only one call to dmsetup and I'm done.
However, I just can't find any info to do this on android.'
The UI doesn't offer this option (as is to be expected) and I just don't know how to do it by using adb.
I've opened a root shell session and tried some commands (dmsetup, cryptsetup, some calls to "vdc cryptfs", etc...), but I just don't find a way to do it.
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Mar 5, 2014
I set a password to encrypt the disk on my N4. When I reboot the phone it ask me a password with a standard keyboard.
My question is : can we change this keyboard for another one or at least its orientation?
the cause is that my screen is broken on the lower right coin and it block the "Done" button. annoying...
The TWRP keyboard to decrypt the disk should be fine (its "done" button is larger enough)
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Sep 1, 2012
I am running Android 4.1.1 on a Samsung GT-I9250M Galaxy Nexus.
Third, I have two carriers: a Straight Talk Unlimited Prepaid SIM (United States GSM/HSDPA) & a Claro Prepaid SIM (Honduras, GSM)
1) I installed the Straight Talk SIM in the phone.
2) I installed the battery in the phone.
3) I powered on the phone.
4) I enabled full disk encryption, choosing an easy-to-memorize password.
... over two weeks, i successfully decrypt the phone on boot 30 - 40 times with the password ...
... then i travel to honduras and purchase a Claro SIM ...
5) I powered off the phone.
6) I installed the Claro SIM in the phone.
7) When prompted to "type password to decrypt storage" I enter the correct password.
8) I am prompted to "try again."
9) I enter the correct password.
10) I m prompted to "try again."
11) I powered off the phone.
12) I installed the Straight Talk SIM in the phone.
13) When prompted to "type password to decrypt storage" I enter the correct password.
14) I am prompted to "try again."
15) I enter the correct password.
16) I am prompted to "try again"
I have tried booting with the Straight Talk SIM, the Claro SIM, and with no SIM. I have tried removing the battery. I am able to boot in Recovery Mode. However, performing a factory reset is not a viable option for me. I need to regain access to my phone. Why would the encryption key be altered by the SIM change? And wouldn't reinstalling the Straight Talk SIM be enough?
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Jul 3, 2013
So I screwed up and lost the passphrase for TB encryption. I have a good working android backup with all the apps+data that I would want to use for my next rom flash. The problem is when I go to TB and disable encryption on my good backup it doesn't allow me to restore the data when I flash a new rom. is there a way to completely remove TB and all of it's app data so that I can start from scratch with TB in order to good unencrypted backups of my apps+data without completely formatting my SD card? I'm stuck on my current rom setup.
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Jul 28, 2013
I'm using a carrier phone right now, specifically, Smartfren Andromax-U LE. It's packing MSM8625Q (Quad-core Cortex-A5 1.2Ghz), 1GB RAM, 4GB Internal, 8MP camera, 4.5" IPS LCD (540x960, 240 dpi)
Here's what interesting to me, when I searching button combinations to bring me to recovery mode, I found a mode that is supposed to be qualcomm disk mode (Windows suddenly told me to format it, meh), and then I tried to plug it in ubuntu, and there's some disk showing up (including android root, FOTA partition, and many more).
So, I was thinking, can I backup the entire internal memory (all 4GB of it), and then restore it back (in case something's go wrong) with dd command?
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Feb 16, 2013
I am currently using SMS Backup+ to backup my messages. It works great but it does not restore MMS messages. Any app that backs up to a cloud service and restores everything including all MMS with the associated pictures, files, videos, etc.
Nexus 4
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Jan 13, 2013
I'm on the latest TB Pro and I want to upload my backup to Box. However it keeps failing since the Sonic CD backup I have is bigger than the 250 MB limit that Box has on its files. Is there any way to get TB to skip it so that it can continue backing up my other files? Nexus 4
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May 3, 2010
If you do a master reset with the Nexus one will you lose all your apps? even the ones that you purchased?
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Dec 7, 2012
Prior to upgrading to 4.2.1, I made a NANDROID backup of my Nexus 7 (4.1.2) using mskip's toolkit. The restoration method copies the backup folder to the device (/sdcard/clockworkmod/backup/), then boots it into custom recovery. At first I was using TWRP 2, but I think I need to be using CWM, so I flashed CWM Touch. I actually went through the motions again of copying the backup over to the Nexus 7, but CWM Touch doesn't see the backup folder. It returns two messages when attempting to Restore:
1. Couldn't open directory
2. No files found
The folder containing the NANDROID backup and all parent folders are readable/writable/NOT Hidden, according to ES File Explorer, but I wonder about ownership.I'm rooted with SuperSU 0.99.
how to make CWM Touch, TWRP 2 or some manual method recognize and restore a NANDROID backup? I know I could just flash stock 4.1.2 and start from scratch (I have apps + data backed up), and if it comes to it.
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Jun 7, 2012
So i broke the screen on my Galaxy Nexus.
I also broke the power button (flex ribbon) at the same time.
I am told that the technicians will wipe the hard drive when they go to fix the screen.
I am wondering if there is a way i can backup the pictures from my phone to my PC without the power on the phone turning on.
Also, is this wipe is even necessary, i have another tech who seems somewhat shady and small scale but claims he can fix it without the wipe.
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Nov 22, 2013
I had backed up my contacts from Samsung phone through Kies to my system.Now I am moving to Nexus 4. how to move my contacts back from my system to Nexus.
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Mar 18, 2009
how to measure Disk Activity and Disk Usage on android ? Unfortunately iostat is not available in Android. I would like to monitor Data read and Data written for disk activity and Utilized and Free space for Disk Usage. I found diskstats but I don't know how to read it.
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Jan 14, 2014
I was thinking about rooting my Nexus 5 and instaling CM 11 on it. The only thing that stops me is the data I have on my phone. I don't want to lose everything when I instal CM, so any good backup facilities which can backup my games progress, pictures and stuff like that?
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Sep 18, 2013
app(.apk) to root Android 2.3 using original master key bug.
Micromax A26
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Aug 29, 2013
The app Clean Master claims it can extend battery life and device performance by killing apps--even offering a button to kill all apps. I thought killing apps was unnecessary since Android does this automatically when RAM is full and that killing apps manually actually drains battery life. What's the deal? Is swiping an app away from the Recent Apps List the same as killing an app? I currently do this often because the list is usually packed.
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Feb 22, 2012
I want to develop a file encryption app, but I do not know how to begin and how to do. I am the new one for android.
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Jun 10, 2012
Enabled native encryption on phone and SD card. Phone took a dip in the ocean. Files on the SD card need to be decrypted, and none of the posts I've read are user friendly to a person with almost nill Crytpo experience.
I understand native encryption uses AES128, but I haven't found an explanation or program that will decrypt individual files.
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Oct 21, 2013
so im wanting to do a factory reset on my phone because its been doing some really weird stuff and have tried everything under the sun to try and get it running smoothly again and the only option i have now is to do a reset ....but im kinda new to android and was wondering how i make sure that my contacts are backed up to google and if they aren't how do i go about doing that..i have a galaxy s3 on att.
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Feb 1, 2014
The photos app on my note 3 has an option to automatically backup my photos to Google +. I don't use Google + or any other social media for that matter. I just want to make sure my photos will be private and no one else will be able to view them. I would rather jus backup to Google drive, but that doesn't seem to be an option without the use of a 3rd party app
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Mar 30, 2014
If you enable device encryption on devices with external sd card, the external sd card always remains unencrypted. As you cannot really control for every app where to store its data, you have some of your app-data on internal sd (encrypted) and some of you app-data on external sd (encrypted). To me this seems to be a security hole, concerning device encryption. why cm team does not include encryption for external sd cards, like some oems do? They put so much effort in security features and on the other side they leave parts of the local storage encrypted?
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Jan 18, 2013
I recently with though a "lost device scare" but I was able to get it back but it got me thinking into securing my device more I was curious about the Native Encryption option on our settings will I still be able to copy pictures off my SD afterwards? And is it root Friendly meaning can I still use titanium to back up my apps afterwards..
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Jan 8, 2013
Any way to revert back to a gesture-based lock screen after enabling encryption on my LG730 with android 4.0.4. I ran the SQLite queries (had to pull the DB and edit on my PC, then push it back), generated a gesture key and pushed it to the phone, restarted and... no dice. The lock screen is still asking for a password to unlock it.
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Sep 17, 2012
I have a tablet NaviaTec, running ICS. Google doesn't support, because this tablet is not so popular cuz it's very cheap. Sometimes when I charge it overnight, in the morning I get Encryption unsuccessful screen. I read 5-6 different threads but all are different methods for different devices.
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Feb 2, 2014
When I had my iPhone, I can do iTunes backup to my Mac and when I have a new iPhone, I can do restore of the apps and data from the previous iPhone. It restore everything, including apps, the apps data, email configuration, etc.
For Android, there is "Backup My Data" under Settings --> Accounts. Does this do the same thing as the above?
For example, I tried to do this:
1). Check "Backup My Data"
2). Associate this with one of my Gmail account
3). Get a new Android phone and... I don't see "Restore" in the same Settings.
I DO see the settings to Backup My Data in the new Android phone, but I am afraid if I checked this, it will overwrite the data in Google's server
I am trying to figure out if Backup My Data can re-download all the apps installed in the older device, including the apps data. I don't care about email or contacts, since those are synced to my Gmail accounts.
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Jan 15, 2014
I am looking for an app with the following functions:
- backup selected folders to Google Drive
or
- backup complete phone to Google Drive
Possibility to schedule backup
Possibility to select to backup only over wifi
I have searched in Google play, but most apps:
- only backup sms, contacts and stuff like that, but now specific, self selected folders
or
- do not have a backup to Google Drive function
or
- can not schedule the backup
Is there any app which can do that?
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Sep 10, 2012
How do I make a backup of my settings, or which file do I need to extract when I want to make a backup of google play?
Issue is the follwoing, As google music currently saves all the music in the Data folder on the Phone (at least in my Galaxy Nexus) and no longer on the sdcard, every time I flash a new rom or an updat I loose Google music. obviously that is not an issue as I can reinstall the app, however the files I want to have locally on the phone need to be re-downloaded. the issue is that with the new install these settings have been lost, and I need to go back in the app and mark every file to be stored offline again from scratch.
I have also tried bracking up via Ti backup, however that leads into bigger problems as after restoring the app gets reset everytime I reboot....
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May 22, 2014
I have a Samsung Galaxy 3. I'll be outside where there is no wifi in a few days. But it's important for me to do working and communicating with my laptop there. How to make my phone a hotspot?
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Jul 17, 2013
When I go to system settings -> security -> encrypt phone, with phone fully charged and plugged in and a suitable PIN set, the phone reboots back to lock screen but does not appear to do anything to actually encrypt the phone. After reboot, the option remains looking identical in the settings menu. No error messages or the like.
The lock screen works fine (PIN required), the PIN is suitably long, everything is updated, etc.
I'm not sure what the issue is. I rooted & changed ROM immediately on getting the phone (it's new), so I don't know whether it would've worked w/ stock bootloader / rom / etc.
I'm running:
Nexus 4 (android 4.2.2)
ParanoidAndroid 3.65 (pa_mako-3.65-20130712 + pa_gapps-full-4.2-20130710)
TWRP bootloader (openrecovery-twrp-2.6.0.0-mako)
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Jun 6, 2013
the file, which defines the places included for a device encryption. Is it vold.fstab? I am asking, because I want my external SD also be part of the device encryption process.
Btw: I am running CM10.1.
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Jul 9, 2013
I'm on gs2 I9100 cyanogenmod 9 and can't find a solution to encrypt internal databases like sms, call logs, contacts... ( so in /data).
No problems with documents in container created by luksmanager. But i wonder is it possible to make a sort of preboot script who mount after correct passphrase a luks container who is symlinked in /data ? Because android ics built in encryption installation stop at beginning.
Is there now new method or app to encrypt full or partial phone? Maybe new encryption function or improvement in JB? Pattern/face unlock fixed?
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