Questions tagged [deletion]

Secure deletion of data.

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How can information be recovered after it has been overwritten (single pass) by a secure deletion program? [duplicate]

We know that information can be retreived after it has been deleted. There are several tools for file "undeletion" (Recuva, FTK, some tools contained in Caine, etc.) I have heard as well, that data ...
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Is shred, srm, or wipe, considered good enough against forensics (when using with ext4)? [duplicate]

Debian10 ext4; not using a "hdd" but rather my OS is on a 16GB micro-sd in orangepi. $ shred -zvu passwords-save $ srm -vz BoD $ wipe -rfi temp The following is from an article whereby the use of ...
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How to detect file or file system tampering

I would like to know if the following is possible: Is it possible to detect a file that has been put into my file system using back dating? Are there any trace artifacts left behind which can help to ...
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1answer
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Can deleting a non-inherited object more than once be exploited for code execution?

When assigning priority for a bug, we had an internal discussion whether in C++ deleting an object more than once can result in code execution if the pointer to object can be corrupted. For the ...
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How to securely delete a file after it was insecurely deleted (in linux)

How can I securely delete/shred a file after I accidentally deleted the file insecurely? Let's say I have Debian Linux installed on a laptop with a 1000T spinning hard disk (so putting aside wear ...
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2answers
206 views

How to completely destroyed all data from an iPhone before reselling it?

I would wish to know more about how to erase 100% data of a used iPhone. Basically, technician from Apple Store only said “Erase & Clear” within the iPhone setting could do all the work perfectly ...
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3answers
225 views

How to make an undeletable, hidden file, which persists after formatting an SD card?

My SD card was stolen some weeks ago. I can't know which SD card is mine, because the thief formatted it. As such, I bought a new one. In order to prevent such situations in the future, I thought of ...
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Does renaming and emptying all the content of a file before deletion make it unrecoverable?

When I delete a file, I rename it to new.txt, open the file in a text editor, press Ctrl+A, Backspace, Ctrl+S to delete all the content and save it as an empty file and then Shift+Delete to ...
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5answers
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How to safely wipe a USB flash drive [duplicate]

I want to wipe all residual data left behind even after a format on a regular 64GB fash drive, the ones someone can scan and recover data. What's the most efficient but quickest way to do this? Any ...
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1answer
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List of valuable folders for preventing their deletions

I am writing software that has an option to delete all files is a user-specified directory. This is the usual case for software. For example, cpp compiler has an option to delete all previously ...
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1answer
1k views

How secure is the windows Cipher command?

So in windows CMD, there is the Cipher.exe Command Line tool. Supposedly it will allow you to fully overwrite empty disk space with 0x00 and 0xFF. (with the /w parameter) There is some further ...
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3answers
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How to protect company sensitive data from being deleted by a user when data is on their computer?

There more than 300 computers and more than 400 users are available. We face two incidents recently when critical users(who has critical data) leave from company.We have deleted their data when they ...
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How to delete data on a “keypad mobile” securely before selling it?

Nokia, Model: C1-01, Type: RM-607 How to delete data on a "keypad mobile" securely before selling it?
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2answers
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Can you wipe a USB flash drive so securely that it's impossible to recover deleted files through forensic analysis? [duplicate]

Internal SSD can be wiped with TRIM, but USB sticks are external SSD. They're apparently difficult to wipe securely enough to make forensic analysis of the device impossible. This question has been ...
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4answers
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Does the destruction of sensitive information limit the choice of hard drives to non-flash based devices?

Working with a non-profit organization,it's common to reuse hard drives that have previously stored highly sensitive information such as medical and financial records. This is primarily driven by cost-...
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1answer
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Is it possible for the government to recover data from a encrypted ssd (veracrypt) that was wiped

Just as the title states I'm wondering if its possible for the government to recover data from a encrypted ssd that was wiped? Thanks in advance!
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2answers
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How important is it to delete disk partitions when wiping devices?

The command lsblk returns the following output that lists 4 partitions. sda 8:0 0 931.5G 0 disk ├─sda1 8:1 0 8M 0 part ├─sda2 8:2 0 40G 0 part / ├─sda3 8:3 0 883.8G ...
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1answer
677 views

Should a secure ATA erase be performed on a non-SSD drive?

When running the command hdparm -I /dev/sda the following output is generated. ATA device, with non-removable media Model Number: WDC WD10JPVX-75JC3T0 Serial ...
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1answer
202 views

Do all hard drives support Data Overlay Configuration (DCO) and Host Protected Area (HPA) for data sanitization?

In the absence of physical destruction of hard drives including flash and SSD (since they are often re-used in different parts of the business or re-purposed for donation), the hard drives are ...
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1answer
286 views

System Encryption With Veracrypt/Truecrypt- What is the difference between Wipe Mode “None” and 3 pass, 1 pass etc?

First I wanted to make sure we're talking about using a Non-SSD Hard drive. I know SSD drives work differently. Here would be a good reference/guide on system encryption: https://www.howtogeek.com/...
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3answers
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Can we wipe an Android phone completely using Encryption and Factory Wipe? (Samsung Galaxy S7 to be exact)

Can we wipe an Android phone completely using Encryption and Factory Wipe? (Samsung Galaxy S7 to be exact) I have a Samsung Galaxy S7. I believe cell phones use flash storage (like SSD) and its not ...
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1answer
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Verification After Data Wipe

A lot of data wipe algorithms have the final wiping pass with random characters. They discuss about verification after the wipe. An example of this is from this link: https://www.datanumen.com/blogs/...
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1answer
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Howto restore factory default state of an USB pen drive?

The proper way to secure erase a SSD is to issue the SECURITY ERASE UNIT command. Then the SSD controller should send a BLOCK ERASE command to all physical blocks. One caveat: the SSD has to be ...
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1answer
321 views

Secure way to wipe an entire SSD? [duplicate]

I've read some articles and they appear to suggest the idea of using the dd command to wipe an entire SSD before encrypting it. The drive in question is a Samsung 970 EVO PCIe NVMe V-NAND M.2 2280 ...
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1answer
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How to securely erase JavaScript parameters after use? [duplicate]

When I pass a password as a parameter to a function, I presume it will end up on a stack or heap. When this function returns I'd expect that my password is still in memory somewhere until it is ...
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What type of data can be recovered from the swap file / page file and thumbs file

This question follows on from a previously posted question on recovery of data from a wiped disk. I have been informed that no files have been found on the computer on the hard disk or in the deleted ...
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1answer
588 views

What can be recovered? Securely deleted files

I’ve recently got into a little trouble and need advice. It seems I may have inadvertently downloaded a illegal file from a p2p network (along with 100’s of other legal files). I was certainly not ...
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2answers
797 views

Linux command to wipe files on an SD Card?

Are there any commands, tools or python libraries to securely wipe specific files from an SD or micro SD card (devices that use flash memory)? For example, with a regular magnetic hard drive, you can ...
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2answers
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Is corrupting the ciphertext corruption a good erasure?

Normally when you wipe a drive there are still ghost remains of the data even after overwriting the disk multiple times. So I was wondering if you could encrypt the drive and then overwrite the ...
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2answers
544 views

Secure erase hard drive [duplicate]

What device/method do you usually use to securely erase a hard drive? The situation is, we have hard drives that we want to use somewhere else, and don't want any data to get recovered later, I can ...
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1answer
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Does zeroing a file on Android work similar to a regular HDD?

On a regular PC hard drive, files aren't actually deleted, so they can still be recovered from the raw data on the drive. So there is the process called zeroing out a file when you delete it so that ...
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4answers
5k views

How completely wipe information of overwritten files and folder?

I have only a basic understanding of how files are written in a hard disk. Here I assume the files are overwritten this way. File A is deleted Its address is removed and showed vacant New File B is ...
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3answers
294 views

Wipe inaccessible hard drive before returning to vendor

My external backup drive broke recently. It just beeps but does not show up in Explorer but in Device Manager. Sadly this drive contains my unencrypted backups. (Not a failure I will repeat). Is ...
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2answers
339 views

encryption - how to secure files - decrypting exposes them on ssd

Let's say I have an encrypted file. Now I decrypt it but since my computer only has ssd, i decrypt it on the ssd drive. Say, I make changes or I finish using the decrypted file so I encrypt it again. ...
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1answer
599 views

GDPR Deletion Request Tracking Paradox - Suppression Lists

I work at a large-ish tech company with hundreds of websites and some large web applications with a very large number of users. I am planning to propose that we have a central system to track ...
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1answer
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Wiping an SSD with Parted Magic seemed too quick

I'm selling a computer with an SSD (it's a Lenovo ThinkPad Carbon X1). I wiped the drive using Parted Magic. I used the ATA method. I'm not sure what that is but it was the only setting available. It ...
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1answer
112 views

How is cryptoshredding a “sole pragmatic option for data disposal in the cloud”?

I'm studying for the CCSP exam and I think I'm missing something here... In reviewing data destruction/disposal methods, I'm aware that an on-premise IT environment has several options: Physical ...
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1answer
56 views

Erasing files and passes - how to understand them? [duplicate]

A few months ago, I downloaded Edenwaith Permanent Eraser from the edenwaith website and set it to DoE (3x) in the preferences. I am using Mac Mini 2011, MacOS Sierra, and use it to delete files and ...
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3answers
172 views

Wipe data from many storage devices

This software for wipe devices of storage: Active@Kill Disk - Hard Drive Eraser. Eraser. Shredit for Windows. Disk Wipe. Darik's Boot and Nuke (DBAN). I wonder if this software is able to use for ...
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1answer
2k views

Router - is there anything to “wipe” before selling

It's a Linksys WRT1900AC. Beyond resetting the firmware is there anything else I should consider as it's been used in a business. I'm thinking about personally identifiable information from a legal ...
3
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2answers
216 views

Wiping a server with sensitive data

ORIGINAL QUESTION: We have servers which we want to wipe and sell due to an environmentally friendly scheme, recycling, reducing carbon footprint etc. The servers have a raid configuration. After ...
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1answer
147 views

Wiping data properly in LUKS encrypted drive

Is it enough just to remove the header of LUKS device to wiping (unrecognizable) the data completely? Or it is recoverable (I don't want to recover though)? I need some safeguard to wiping my ...
1
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1answer
138 views

Does editing a file and saving it permanently overwrite it?

Does editing a file and saving it permanently overwrite it? Is this a foolproof method of data destruction? I have a file that I need to fully erase, is this the way? I am running Linux and the file ...
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2answers
442 views

Is it secure to wipe a file in a Virtualbox disk if the vbox disk file is on an ssd?

Preface I searched for an answer to my question and found related questions which do not cover my question completely. Like: On SSD deleting: Can Widped SSD Data be recovered How to securely delete ...
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1answer
529 views

If I sell my printer, can the last printed pages be recovered? And how can I wipe it?

I have a Brother 5470-DW Printer. I want to sell it but wanted to make sure all the last prints can't be recovered. If I sold my printer could the last pages printed be recovered? How can I wipe all ...
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1answer
428 views

Is SSD encryption useless on data already present?

The reason I ask this question, is that presumably when contents on an SSD are encrypted, the unencrypted data is overwritten with its encrypted version. This study tells us that overwritten data can ...
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1answer
770 views

How to secure erase files and folders? [duplicate]

How to securely erase/delete files or folders in different file systems (NTFS, ext3, ext4) ? Need to delete files so it will be impossible to recover that files and no traces of metadata and traces in ...
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0answers
124 views

Will overwriting a file before deleting guarantee the destruction of the original file's data [duplicate]

Say I have a file I want to erase. Simply deleting it is not enough. It still resides in the recycle bin. Emptying the recycle bin does little as well, the actual data is not deleted just the pointer, ...
2
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1answer
214 views

What happens to a VM when you delete it? [closed]

I was curious what happens when you select "delete all files" option in Virtualbox? Are files saved on the installed OS in Virtualbox recoverable on your hard drive? Is there a secure way I can delete ...
2
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1answer
5k views

How can I delete Telegram messages from their server? [closed]

Since I heard that Telegram stores all the chats including messages, pictures, audio & video material on their servers (cloud) I would like to know how can I delete all of my chats from my phone ...