Root for SM-T290 (tab a 8.0 2019)

[LUCID_DREE]

Good, also open that file in 7-Zip

wow, its a part file of a backup still it opened without errors

 

[LUCID_DREE]

Good, also open that file in 7-Zip

Next step?

 

[Minionguyjpro]

Next step?

Where did you store the stuff you need?

 

[LUCID_DREE]

Where did you store the stuff you need?

[deleted]
can we transfer drm keys from one device to another ?

 

[J.Michael]

Next step?

What do you mean "next step?"

Did you click on a directory to see if 7zip would "open" it?

Do you remember what you are trying to recover?

 

[Minionguyjpro]

I dont know the location of those drm keys . Because of those drm keys only i viewed my video lectures. Otherwise i would have found it if it were normal unencrypted files lying in img files. Any hope of restoring these images on any android emulator? Or can we transfer drm keys from one device to another ?

If you know the location where you stored those keys, we can get them. Are they stored as files?

 

[LUCID_DREE]

What do you mean "next step?"

Did you click on a directory to see if 7zip would "open" it?

Do you remember what you are trying to recover?

Yes for 1st question. Yes for 2nd question. [deleted]

 

[Minionguyjpro]

Yes for 1st question. Yes for 2nd question. The drm videos(on separate hard disk but encrypted) which i see are decrypted using the drm keys stored in this naandroid backup.

But we first need to know where they are. What software did you use to access your study files?

 

[LUCID_DREE]

If you know the location where you stored those keys, we can get them. Are they stored as files?

[deleted]

 

[LUCID_DREE]

But we first need to know where they are. What software did you use to access your study files?

[deleted]

 

[Minionguyjpro]

it was a coaching instiute's android app. Are we planning to find the location of those keys by reverse engineering the apk of the app?

That could be possible. Did you also make a backup of the internal storage partition? Also look in the data partition, and then search for the APP.

 

[LUCID_DREE]

That could be possible. Did you also make a backup of the internal storage partition? Also look in the data partition, and then search for the APP.

ok . right away. [deleted]

 

[Minionguyjpro]

ok . right away

Is this the app that you were using?

Vinayak Coaching Institute - Apps on Google Play

Connect with Vinayak Coaching Institute

play.google.com

 

[LUCID_DREE]

Is this the app that you were using?

Vinayak Coaching Institute - Apps on Google Play

Connect with Vinayak Coaching Institute

play.google.com

no let me send link [deleted]

 

[Minionguyjpro]

no let me send link

Okay

 

[LUCID_DREE]

Is this the app that you were using?

Vinayak Coaching Institute - Apps on Google Play

Connect with Vinayak Coaching Institute

play.google.com

[deleted]

but they have updated the app and i have the backup apk of th old apk , just need to find and send , if you need that specific version which i made nandroid backup on.

 

[Minionguyjpro]

Also, what are actually those DRM keys? I never heard about them.

 

[LUCID_DREE]

Also, what are actually those DRM keys? I never heard about them.

[deleted]

 

[Minionguyjpro]

those keys are different for diffrent companies. its actually those keys which proprietary media vendors use so that common public are unable to make unencrypted playable mp4 of their streamed media content, eg netflix , amazon prime, etc. so that we just stick to their platform.

Would those keys be in the data of each app or on the system? And how do you actually know that the app uses such keys?

 

[LUCID_DREE]

Would those keys be in the data of each app or on the system? And how do you actually know that the app uses such keys?

not each app. those keys are present either in that app only or among my android system files . i know because when i run the mp4 videos provided by the app on normal players like vlc or mx player they are unable to read it and show error while plays smoothly in the app. Also in the new app there is an option to use old drm sytem or new drm system which proves it. Also , i saw in the app data folder that it download videos and their audios as separate file. like mp4 with no audio and then a separate mp3 file . it then uses its drm keys to decrypt in timewise fashion as well as make a complete video with audio [deleted]