Questions tagged [deletion]

Secure deletion of data.

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39
votes
7answers
7k views

At what point is deleted data irrecoverable?

From reading around on the internet I get the impression that barring physical damage, deleted data can be always be recovered using sophisticated digital forensics. For this reason the advice is ...
1
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2answers
97 views

What’s the best way to permanently delete data from your iPhone?

As the title suggests what’s the best way to permanently delete data from an iPhone. I know when you delete something, it’s not really deleted, but merely marked as ‘free space’. So how, on an iPhone, ...
2
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2answers
135 views

Are deleted files more or less likely to be overwritten than blank space?

Let's say that I have some files on a hard drive (the data for each file is represented by a different letter): xxxoooozzzz--------------------   Now let's say that I delete file Z without ...
1
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0answers
52 views

Secure deletion on Android

My understanding is if I delete photo001.jpg, this deletes the index and assigns it to the free space to be overwritten. So this brings me onto my next scenarios. If I have a device capable of 8gb ...
1
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1answer
45 views

How to verify secure erasure of Android and Apple mobile devices

I'm aware of how to securely sanitise and verify the sanitisation of data from both HDDs and SSDs, but mobile phones complicate this due to being there a lot of proprietary layers standing between the ...
0
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1answer
33 views

Parted Magic Secure Erase Verification Level

I've been experimenting with the latest Parted Magic Secure Erase to wipe HDDs and SSDs. After the Secure Erase completes, I noticed in the logs that the verification level is 10%. Excerpt from the ...
0
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2answers
79 views

Does crypto shredding count as deletion in regards to CCPA?

I have a compliance question around crypto shredding and CCPA. I'm basically just wondering if crypto shredding is sufficient to comply with the CCPA customer deletion requests. I know that crypto ...
2
votes
1answer
181 views

Are deleted offline calendar events in Android actually deleted?

When an Android app deletes a calendar event in a local (offline / non-synced) calendar, does Android's Calendar Storage (com.android.providers.calendar) actually delete the event or does it just flag ...
2
votes
1answer
66 views

Fetching GPG private key from Linux server to decrypt files on a Win 10 computer in production

I have a need to fetch automatically the GPG private key from a Linux server to decrypt files on a Windows 10 computer in production. There are a few challenges here: How to assure SCP from the ...
0
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0answers
14 views

Is it possible to delete all traces and files on a mac? [duplicate]

Is it possible to delete all traces and files on a mac, so no one can recover files and there will be no traces at all for this files or any activity?
0
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1answer
96 views

Can the photos/videos I deleted a year ago can still be on my iPhone or on the Internet?

I have been getting paranoid lately and decided to ask for your insight on this issue. A year ago, I took photos of some personal information (cc, passport, etc), and deleted them a month later, along ...
0
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2answers
38 views

Benefit of remote wipe when the drive is encrypted?

How much is "remote wipe" beneficial for company data protection on company laptops, assuming that the storage is encrypted? I understand it so that only determined, targeting attackers are ...
2
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3answers
252 views

How to make information unrecoverable?

I manage a company's equipment and the manager has used a piece of equipment for the last 3 years. He told me, that he will give that equipment to one of the employees. However, he has told me to ...
27
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5answers
7k views

Permanently erasing a file

As far as I know, there is a table of files present in the hard drive that does not contain the data of each file but can point you to it. When you delete a file, the record of it gets deleted from ...
92
votes
8answers
35k views

How can I reliably erase all information on a hard drive?

As storage technologies change over time, using different encodings and remappings to deal with sector errors, the best way to permanently erase/wipe/shred data changes also. Methods for flash drives ...
1
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0answers
47 views

Detect use a private key by more than one or by someone other than the owner [closed]

I'm designing a protocol over the SSL but I faced a challenge. In the network each user takes a private key from authority. I want to just the owner can use his/her the private key. there are two ...
1
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1answer
518 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/...
0
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1answer
155 views

How to determine start and end bytes of LUKS header?

How can I determine the exact start byte and exact end byte of a LUKS header on a block storage device? I use Linux Unified Key Setup (LUKS) for Full Disk Encryption (FDE), so all of the data on my ...
1
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1answer
467 views

Do all hard drives support Device Configuration Overlay (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 ...
55
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6answers
142k 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 ...
22
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3answers
2k views

I forgot to shred a file before deleting it (on Windows). How do I shred that part of file system now where the file was located?

My company has a policy that files have to be shredded after they've been read. They provide with a tool shred.exe that I run on the file and it overwrites it with garbage in the file system before ...
1
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2answers
3k views

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?
0
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0answers
22 views

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/...
0
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0answers
42 views

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 ...
0
votes
1answer
69 views

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 ...
2
votes
3answers
224 views

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 ...
1
vote
1answer
120 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 ...
2
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0answers
148 views

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 ...
1
vote
1answer
53 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 ...
5
votes
0answers
189 views

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 ...
1
vote
2answers
661 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 ...
0
votes
3answers
260 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 ...
0
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0answers
75 views

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 ...
31
votes
5answers
7k views

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 ...
15
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3answers
5k views

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 ...
2
votes
1answer
6k 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 ...
0
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1answer
42 views

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 ...
0
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3answers
213 views

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 ...
1
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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 ...
28
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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-...
5
votes
0answers
3k views

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 ...
-2
votes
1answer
330 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!
0
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2answers
439 views

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 ...
5
votes
2answers
201 views

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 ...
9
votes
1answer
1k 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 ...
2
votes
3answers
7k 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 ...
88
votes
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 ...
2
votes
3answers
338 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 ...
9
votes
2answers
3k 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 ...
1
vote
1answer
192 views

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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