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File: 7ee44c49a33a4f9⋯.png (177.47 KB,1355x676,1355:676,1554745890312.png)

 No.9686

if an image is edited and overriden several times in an image editor, then opened in notepad and edited there also several times, making the file corrupted and unable to open, then deleted, would it still be possible to recover it?

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 No.9687

>>9686

probably not, also >>733048

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 No.9688

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 No.9693

>>9686

Yes.

Especially if the image is stored on a solid state device due to the way data is stored.

Each time you save the file you could have a new copy saved in some part of the solid state device due to things like wear leveling. Even when you 'delete' the file in many operating systems you are often only deleting an index table entry pointing to the file and not the file itself on the storage device.

On solid state devices like memory cards you can run a command to write zero/random data to the entire disk, but still not remove it - since your access to the actual silicon where the data is stored has to pass a 'gatekeeper' the memory controller that determines what "the entire disk" means.

For example: You buy a 16Gb memory card. The actual card may have 32Gb of silicon memory (there's a random minefield of reasons why this happens, and even if you buy 2 'identical' memory cards from a reputable vendor it is probable there are significant differences), but the memory controller only allows you to ever see 16Gb.

There is a lot more to it, but basically If your data touches a device, consider it contaminated for life. Device destruction is the only sure way to remove it.

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 No.9698

>>9693

so you can't shred SSD by dd if=/dev/zero of=/dev/sda? That sucks, I guess I'll have hammer times in future when current SSD drives will be old and useless.

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 No.9704

>>9698

>so you can't shred SSD by dd if=/dev/zero of=/dev/sda?

TL;DR No.

Longer answer, no because you cannot be certain what part of the silicon the memory controller is telling the computer is /dev/sda at any given time. Your data isn't even on the drive in reality, only a probabilistic representation of your data is stored, and it is checked by error correction algorithms on 'data' retrieval. This means degaussing, physically shredding, then burning would be the way to delete the data permanently.

The only direct addressing silicon long term storage was on compact flash cards.

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 No.10747

>>9704

What if you write your whole disk with a 16gb file for cleaning purposes?

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 No.10748

>>9686

There's better ways to hide your CP.

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 No.10765

File: ba773bfb088f121⋯.gif (170.14 KB,360x346,180:173,tenor.gif)

>>9686

>I tried to get rid of my folder full of CP because the feds are coming after me

>How to delet my CP /g/ ?

I have already reported this thread and the feds will get your IP from your ISP and bust your door wide open in a couple of days. Enjoy getting ass fucked in prison by tyrone

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 No.10795

>>9698

Some SSDs do support a secure erase command which tells the memory controller to completely wipe every block of physical memory.

Of course that still leaves you needing to trust that it has been implemented properly.

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 No.10798

>>10765

if he had to ask he probably does not uave any good shit

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