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Questions tagged [deletion]

Secure deletion of data.

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How do I erase data blocks on a SSD using Linux commands?

There’s no clear set of commands available that will securely erase the data blocks on SSD from the Linux command line. I am familiar with hdparm commands but it seems they erase the mapping table ...
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How to securely erase the free space on an SSD in windows 10?

I would like to wipe ALL free space on my SSD which Windows 10 is installed on, so that no previously deleted file can be recovered. How can I achieve this?
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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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Kaspersky detection locally 3 years old file, clean on virus total. Compromised? [duplicate]

I just got a warning on a file locally: Weird, as I have this program for like 2 o 3 years, Just before got cleaned, I upload to virus total, totally clean on cloud. https://www.virustotal.com/gui/...
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DBAN alternative [duplicate]

I'm selling my computer (HDD). I had some important data on it. Please don't tell me to physically destroy that drive, I need the money. So I'm looking for some reliable solution that could erase ...
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Preventing data remanence at filesystem / OS level

We all know that deleting a file from your computer does not really erase it, but only marks as free the memory where the file was written, so that, until such memory is not overwritten, the file can ...
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3answers
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Is it sufficient to use a hard disk magnet to corrupt/erase floppy data?

I would like to make data, in many (more than 250) old floppies, unreadable/unrecoverable. I have some HDDs that I can take apart. Their magnet is sufficient to do the job to make it unreadable to ...
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100 views

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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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
51 views

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
266 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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237 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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3answers
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Is there a real-world example of SSD data recovery?

Secure data deletion is known to be more complicated and elusive on a solid-state drive than for a regular hard drive. For instance, the logical block mapping on the SSD's flash translation layer ...
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1answer
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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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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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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
1k views

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
5k views

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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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
241 views

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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Chances of recovery of data from iPhone 5s if memory has been overwritten 35 times?

Use the app 'shredit!' and do the 35 time overwrite. Then you fill the phone with unnecessary data and then reset it to factory settings and erase. What are the chances of recovery of data that was ...
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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
852 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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3answers
6k views

How secure is Secure Erase option in BIOS?

I have been exploring data security lately and came across HDD data recovery. I now know that a format simply deletes the "pointers" to files and directories and that data is still there. The only way ...
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1answer
17k views

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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3answers
308 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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2k views

Magnet to wipe HDD [duplicate]

This question is for HDD, not SDD. Would a Neodymium magnet like this one be strong enough to wipe the contents of a hard disk drive? How long would such an act take to destroy any data so it's not ...
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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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2answers
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Is there a risk that file shredders and free space wipers steal our confidential data?

I was wondering how secure are the file shredding software and free space wipers? Lets say we are using PC Windows, and software CCleaner (from piriform) or File Shredder (found here) to securely ...
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1answer
202 views

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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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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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
407 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
156 views

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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1answer
701 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
964 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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3answers
2k views

How to delete one exe file that is probably malware?

I stupidly saved an .exe file that claimed to be an urgent Firefox patch (318K). I haven't (and won't) run it, but how can I delete it so that it's gone, i.e. no risk to my Win7 laptop? I thought of ...
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2answers
103 views

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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1answer
617 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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2answers
579 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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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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2answers
406 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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6answers
137k views

Can wiped SSD data be recovered?

I was reading another post on destroying IDE drives, and how you could remove data, wipe it, or just destroy the drive. The removed data would still be there in some state, although not easily ...
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3answers
181 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
379 views

Best current methods for preventing data leakage from SSD

I'm wondering about the current best practices for ensuring data confidentiality on an SSD used as an OS boot drive (under Linux). Important considerations are: Ensures against data leakage in the ...