Questions tagged [file-encryption]

The process of encrypting individual files on a storage medium and permitting access to the encrypted data only after proper authentication is provided.

Filter by
Sorted by
Tagged with
1 vote
1 answer
85 views

Military-grade encryption on Blu-ray discs?

Another thread addresses the question of what can count as "military-grade encryption." In this case, I see that CyberLink Power2Go software boasts "advanced military-grade 256-bit ...
user avatar
0 votes
0 answers
4 views

What will happen to existing documents when AIP sensitivity label is redefined? [migrated]

Scenario: Admin defines and deploys sensitivity label in Microsoft Purview Compliance Portal, sets the access rights to a group of people. Some user uses a sensitivity label to protect/encrypt the ...
user avatar
  • 141
0 votes
1 answer
57 views

How to design a secure file storage/sharing platform

As the title implies, I would like to design a secure file storage/sharing platform. This is an abstract design question, so details regarding programing languages or platforms are not particularly ...
user avatar
1 vote
0 answers
29 views

multi-user deterministic symmetric encryption [migrated]

I was wondering whether there exists a symmetric encryption scheme such that there is 1 sender and n receivers. Each receiver has 1 random and independent symmetric key. The sender knows the ...
user avatar
0 votes
0 answers
59 views

Secure logs on an embedded IoT device

I need to secure logs on a IoT device (Infineon TC233). It has 2 MB flash and a HSM. We are at the design stage of development. Since logs will be primarily event & data logs, the size of the log ...
user avatar
3 votes
0 answers
100 views

When using VirtualBox, is it better to use the VirtualBox encryption or the OS disk encryption?

VirtualBox has an option to encrypt the drive of a VM. When I installed Debian or Ubuntu, I have the option to say that I want the full disk encrypted. I'm thinking that both do pretty much the same ...
user avatar
1 vote
0 answers
42 views

Attack on home dir encryption with sddm pam_mount by using password in /etc/shadow

I'm using Debian + sddm + KDE with ONLY home directory encrypted with gocryptfs. Decrypting is performed with gocryptfs as follows: PC boots as usual and starts the sddm service I enter my login ...
user avatar
0 votes
1 answer
42 views

Is there a way for a file/binary/exexutable to verify it's own integrity?

So I'm making a distributed recovery system which consists of a bunch of hidden usb sticks. I plan to have the file be an executable, probably in the form of a appimage, which will contain my ...
user avatar
0 votes
2 answers
77 views

Is it possible to eavesdrop HTTPS encryptions by file size?

I see that HTTPS uses symmetric encryption for the file transfer, often AES. I also read that AES uses padding to help obfuscate the data itself. Though I am curious how powerful that padding is when ...
user avatar
  • 101
0 votes
1 answer
95 views

How do I import a private key from a hard copy?

I started playing with encrypting some personal files, and I exported the private key as an .asc file, but also on hard copy (plain paper) and can't understand a thing about how it says to import it ...
user avatar
  • 3
0 votes
1 answer
109 views

Should I encrypt backup files with WinRar?

Currently we don't have a server in a small organization with a very limited budget. We do backup by syncing files between workstations with Windows 10 OS. I'd like to encrypt these files because they ...
user avatar
  • 487
0 votes
0 answers
71 views

Step-by-step file encryption/decryption using user-supplied password

Let's say I want to build a dropbox clone. When users upload files they need to be encrypted. Later on, when the user needs to access their files, the application should be able to decrypt them using ...
user avatar
  • 101
1 vote
1 answer
156 views

At-rest encryption. Use SFTP log-in credentials to unlock/decrypt encrypted drive or folder on an Ubuntu Linux server

I have a simple file server running on a small Ubuntu machine that facilitates file sharing and 2 way folder syncing between my and my girlfriend's 4 computers through SFTP over a private network. The ...
user avatar
0 votes
1 answer
120 views

What’s the best way to only allow a file to be opened with multiple people’s authorisation?

Is there software available that makes it easy for multiple authorisations to be required before a file can be opened? The simplest solution I've found online is to encrypt a file with a password, ...
user avatar
0 votes
3 answers
185 views

Naming encrypted files in the cloud, without leaking info about their content

I'm working on a photo sharing app that stores files in the cloud, encrypted, and lets you share those files with others. To do that, as suggested in answers to this previous question: files are ...
user avatar
1 vote
3 answers
172 views

Standard for encrypt files before transfer them over internet

I know there are some standards for transferring data securely such as HTTPS for web applications, or SPC & SFTP for secure file transfers. Encrypting files using PGP is a way to encrypt files ...
user avatar
  • 185
0 votes
1 answer
207 views

What is the best way to encrypt extremely sensitive and important data

I have a set of text data, that are of high importance and I want to encrypt them. Be it to keep it on a cloud for redundancy, or for an extra layer of security in my local machines. I understand ...
user avatar
  • 781
0 votes
1 answer
139 views

File transfer service through server that is not P2P, encrypt files without letting the server know its contents

A file transfer tool, that works through a middle man server, as the following diagram: Client A uploads a file to the server, Client B has websocket events that a file is transferring and starts ...
user avatar
0 votes
1 answer
123 views

Security Tools - File Encryption vs Corruption

When security tools quarantine files, why do they tend to use encryption, rather than simple file corruption? The main goal of quarantining a file is to make it impossible to run on a system. This ...
user avatar
2 votes
2 answers
128 views

Sharing files with others, encrypted on untrustworthy file storage (e.g. the cloud)

I want to work on a photo-sharing tool, where I can: store photos on untrustworthy disk space (like the cloud) share photo albums with friends and family update photo albums (rarely but happens) ...
user avatar
20 votes
3 answers
6k views

Not understanding why I should use public/private key encryption over password?

My knowledge about these topics is very elementary, please "school me" if I said something completely wrong, it would surely help me understand these things better. Now, to my issue. Now ...
user avatar
0 votes
1 answer
109 views

I want my customers to download the encrypted video file to a secured usb and play it directly in TV by providing unique key which i shared to them

How do I make sure that this content is not hacked by anyone ? Do I encrypt every file and store the key before my customers download their unique copy?
user avatar
0 votes
0 answers
155 views

Where to store passwords needed by linux processes?

I am working with C++ processes on a linux (CentOS 8) environment. These processes should be able to access an encrypted file on the system. Where should I store the password for this encrypted file? ...
user avatar
0 votes
1 answer
107 views

How to securely encrypt shared data for a dynamic amount of users?

Example: Bob uploads a file to my custom file server locked with a password, which then the file server generates a link for him to share Bob wants to be able to share this data to anyone that has ...
user avatar
0 votes
1 answer
183 views

Is it possible to extract encryption keys from software executing on your own system?

I'm a newbie in this field so forgive me in advance if this question is stupid in anyway. Say we have a software that is executing on our system and encrypting files using a secret key that is not ...
user avatar
  • 3
3 votes
3 answers
309 views

Does EFS protect against data theft by ransomware?

Recent ransomware events often include data theft in addition to just encrypting data. The Encrypting File System on Windows Pro/Enterprise editions encrypts individual files using a private key ...
user avatar
0 votes
1 answer
339 views

Where is the PDF encryption key stored

Assuming you have the user protected PDF file. Using the password, the cryptographic key is generated and the file encrypted. Where is the key stored, is it on the RAM every time the file is opened?
user avatar
0 votes
1 answer
167 views

Does Wire encrypt data-at-rest in their apps?

Does Wire employ encryption of data at rest? I generally consider Signal and Wire to be the best tools today for sending information privately between two parties. Both meet the marks on crypto, open-...
user avatar
0 votes
0 answers
427 views

Crack Windows 10 password with Cain and Able

A few months ago I reset my Windows password but my keyboard must have had a sticky key or two, effectively changing my password to an unknown password. Out of desperation and a little research I used ...
user avatar
  • 101
0 votes
2 answers
112 views

Key derived from source files; deduplicated file storage

I'm wondering if the following system would be a secure way to store frequently duplicated files. Hash the source file, deterministically derive a key from it. The source file(s) are likely to be ...
user avatar
1 vote
0 answers
770 views

Decrypt AES 128 encrypted file with a key file

I have a file which is encrypted using AES 128 and I have a key file whose size is 48 bytes. How can I decrypt the file using the key file? The key file has no extension, I opened it in notepad and it ...
user avatar
1 vote
1 answer
154 views

Can a host access a VPS disk's encrypted directory directly while running?

I have an Ubuntu VPS running at a remote host. The disk is not encrypted but I have a specific directory that is encrypted for which I must provide a password via an SSH session (not stored anywhere ...
user avatar
0 votes
1 answer
2k views

Still able to recover files after running cipher.exe on windows 7

After running cipher.exe on my entire C: drive, I'm still able to recover deleted files using recuva. In fact, doing a before and after, I see no discernible difference in the files that are able to ...
user avatar
0 votes
0 answers
69 views

How to protect IP-sensitive data in files generated and used by users

I'm working on an offline windows application that generates and loads key results as files. However, these files provide key insights into how our product works internally. To make matters worse my ...
user avatar
  • 101
1 vote
2 answers
222 views

How can one encrypt a file and be sure the original file can not be recovered on a SSD?

Let's say that I have an unencrypted file and I'm trying to encrypt it and make sure the original file can not be recovered from my disk. If I, for example, create an archive, put the file into it and ...
user avatar
3 votes
2 answers
934 views

How to pass both passphrase and password in GPG signed symmetric encryption?

I am new to GPG so I may be going about this all wrong. I have some files I would like to encrypt symmetrically using AES256, but I want to sign them with my GPG key. I need to automate this process ...
user avatar
1 vote
2 answers
159 views

What is the name of the crypto system used by ICANN's DNS recovery system?

I once heard about a type of crypto system that behaves in the following way: I have x secret keys that work together to decrypt messages encrypted with a public key d. If I get at least n of the x ...
user avatar
0 votes
1 answer
106 views

Does GPG encryption via subkey harm file quality?

If I were to encrypt a folder with music files or movie files, or even only the files themselves separately, would that hurt the quality of the files? For example, if I encrypted a lossless audio file,...
user avatar
1 vote
3 answers
204 views

Preventing access to encrypted files at all

Suppose I create an encrypted container using VeraCrypt and want to upload it to Google Drive/One Drive for storage. The container is encrypted with AES-256. I know that no one can extract any meaning ...
user avatar
  • 275
2 votes
1 answer
230 views

How can a pdf file have two passwords?

I receive emails from my bank with password protected PDF files, and they provide two passwords - either xxxx or yyyy. How is this possible?
user avatar
  • 121
4 votes
2 answers
372 views

What is the reason for iOS per-file key encryption?

I know that apple provides per-file key encryption .i.e. a separate encryption key for each file exists on the apple device. The Hardware Key and the Passcode are required to generate these random ...
user avatar
0 votes
0 answers
129 views

Decrypting a file knowing only the password

I have encrypted a file using a program with a password and would like to decrypt it on another device just with the password. Is there any software that takes the password, runs it through all key ...
user avatar
23 votes
6 answers
6k views

Strongest file encryption available

I know nothing about cryptography. How does one encrypt a file in the strongest possible way, such that it can be accessed some years later? I prefer that it should be fairly resistant from brute ...
user avatar
  • 239
0 votes
0 answers
290 views

Attacked by ransomware that has encrypted and renamed all files with a .makop extension [duplicate]

I've spent several hours searching the internet to see if anyone has cracked this encryption yet, but without any luck. I don't want to reward criminals for their activity, but I do have a few files ...
user avatar
  • 101
1 vote
1 answer
276 views

If someone steals my unencrypted, password protected laptop, would they be able to get into my Google account?

I have a laptop with Ubuntu 20.04 operating system. I am logged into my Chrome browser using my Google account. This means, every time I open my browser, I am already logged into all the Google ...
user avatar
10 votes
4 answers
2k views

How to quickly find out what the threat nature of a password protected archive is without getting infected?

I have recently received an e-mail from an existing support group e-mail box with the following characteristics: written in the language used in company's HQ (different from English which is the ...
user avatar
  • 2,173
0 votes
0 answers
92 views

Password Vault Storing Passwords

I've been working on just a fun side project in C++ to practice encryption algorithms and I sort of ran into a bit of a roadblock of sorts. To summarize the project I have a text file of encrypted ...
user avatar
3 votes
3 answers
594 views

Folder level encryption on a Windows 10 Pro laptop

Most of the stuff on my laptop is benign; and the hassle of full disk encryption is not worth it. On the other hand, one or two folders I would love to encrypt and password protect. What's the best ...
user avatar
  • 1,013
0 votes
0 answers
178 views

How secure is /dev/stdin in UNIX systems?

Is decrypting secrets with ccrypt and piping the result via stdin to openvpn secure? I've written the following alias to start an openvpn client more easily than before: sudo bash -c 'cd ...
user avatar
1 vote
0 answers
381 views

Recovery of files from a zip containing a directory (unencrypted) and 3 files (encrypred - ZipCrypto Deflate), possibe use of bkcrack?

I have a zip file, Example.zip consisting of a directory Example and three files *.dat. I can see the names of all 3 files. The dat files are encrypted (ZipCrypto Deflate). I'm interested to know if I ...
user avatar

1
2 3 4 5
10