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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.

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What program can Decrypt specific a Folder/Files during Windows Boot/Loading? (Windows)

I've been looking into Encryption of my data for some time now; I've decided to move ahead with VeraCrypt for encryption all of my partitions (I have 2 disks in 1 laptop) except for the OS (C:) ...
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1answer
879 views

EncFS vs EFS advantages for Dropbox-seamless encryption

I am considering a solution for securing my private data in Dropbox. In spite of OneDrive, MEGA and AmazonCloud are also being considered but now I put my focus on Dropbox as the most feature-rich of ...
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1answer
121 views

How is it possible that hardware-encrypted flash devices are safe?

I start with the fact that I understand how flash devices (pendrives) can be encrypted with software, for example Bitlocker. Simply, the encryption key is the password given during encryption and ...
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1answer
54 views

Using network MAC derived decryption key

I am quite new to security. Would appreciate if someone can give pointers to solve the following problem I have a requirement where I have some documents to share with other parties I would like to ...
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1answer
38 views

Storing files in database through encryption and Viewing them only on providing key for the file

I have this use case: User1 uploads his file into the database which should be encrypted. Any other users who request that file, user1 will be notified for approval, on approving other users should ...
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1answer
81 views

Is GPG symmetric (decryption) vulnerable?

Suppose a file (say, a text file source.txt) was encrypted into danger.gpg using GPG symmetric encryption on a compromised device. Since the device is compromised, danger.gpg could have been created ...
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0answers
222 views

Is there are way to do Per-User Encrypted Samba Storage?

I'd like to address following scenario: Company keeps documents in-house and not in Cloud Documents are stored on Samba Share Sysadmins have access to the storage so they can dump it The point is to ...
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0answers
240 views

Has Stackfield been security audited and is the metadata safe?

It appears that Stackfield is one of the only functioning applications that combines end to end encryption, messaging services and file sharing. Peerio has just been launched (literally a day or two ...
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0answers
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Which attributes does DPAPI's “UseMachineProtection” use to identify a machine?

We're using DPAPIProtectedConfigurationProvider from the Windows Data Protection API to encrypt an application config file. The API offers a property called UseMachineProtection, so that the config ...
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0answers
25 views

Using the same passphrase for files and filenames with filesystem-level encryption such as eCryptfs

In filesystem-level encryption schemes where files are encrypted and stored individually, filenames may or may not be encrypted. eCryptfs allows to encrypt filenames with a different key than the one ...
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0answers
78 views

Can Gmail read password protected .docx files?

Can Gmail read MS-Word .docx 2011 (OS X) files that require a password to open? As I understand it, Gmail servers read emails and attachments in their efforts to characterize users for advertising ...
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0answers
179 views

Decrypt to memory for editing

I am looking for a secure way to edit sensitive text data, using Git and Vim in the process. An ideal solution would be: clone the encrypted git repository into memory; decrypt into memory; do the ...
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0answers
40 views

Is this protection for customer data both secure and fast enough?

A small electrical installation company has a big list of customers. The list contains personal information like names, phone numbers, addresses, info (like what product/installation) and some small ...
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0answers
122 views

Is volume level encryption enough to satisfy compliance requirements?

We are implement a cloud application and using nosql technology. We know there are quite a few compliance requirements out there require doing data encryption at rest. However, we would like to know ...
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0answers
80 views

Windows EFS Files Spontaneously Unavailable

We are trying to secure a folder with over 1 million very small text files using Windows EFS on Windows Server 2008 R2. We already have an infrastructure in place for backing up keys and data. We ...
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0answers
87 views

Encrypted file to Remote Storage

Suppose I wanted to send some files to a remote storage device and (reasonably) guarantee their security and I am wondering whether something like the following method would be suitable: Encrypt a ...
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0answers
208 views

Encrypting File System Data at Rest on Windows Web Application

We have a web application (running in Apache Tomcat on a Windows Server 2008 machine) that stores most of its data in the file system. We are investigating ways to implement encryption for this data ...
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0answers
55 views

Secure upload/download design with malicious storage server

Assume we have a malicious storage server (a user-agnostic key-value store, supporting server.put(key, value) and server.get(key)) that we want to use for per-user based secure file storage. The two ...
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0answers
68 views

when/how does an encrypted volume .dmg change to reflect the file system it stores

I'm trying to verify that storing a .dmg file stays encrypted while only the mounted file system is unencrypted (see here). My thought was to create a .dmg containing a text file, make a copy of the ....
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0answers
329 views

AES keyfile size

I would like to encrypt files using a key file instead of a password. What I would do is: 1) Generate X random bits using openssl rand X > mykey 2) openssl enc -aes-256-cbc -in secretfile -out ...
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0answers
263 views

Clear EFS Cache at Set Interval

My boss wants to set up encrypted file shares using EFS on Windows Server 2012 R2 Boxes accessed by Windows 8.1 clients. I've been able to set the default DRA, issue certificates in test cases and so ...
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0answers
127 views

Where to save digital content and prevent sharing?

I've been inspired by the answer to the question here: Location to store an encryption key It gave me a lot to think about. My friend and I are building a website and we've encountered a problem in ...
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0answers
2k views

Brute-Force/Dictionary attack against encypted file using PBKDF2 key derivation

I have been following this very useful post by Thomas. My use case is slightly different. I am developing a mobile application which requires some sensitive data to be stored on the device in a SQLite ...
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38 views

Why boxcryptor use hybrid cryptosystem to encrypt files

I do not understand why they need asymmetric key encryption, if the client does not use the public key. As far as I understand it, the user password is used to decrypt the private key and no public ...
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0answers
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Is it possible to encrypt Word Docs with something other than default?

AES 128-bit advanced encryption is fairly simple to break and was wondering if there was any way to use a more secure one? And if so - any suggestions?
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Is there any sense in encrypting a file for one's own later use?

Let's say you have a single sensitive document. You're traveling to somewhere high risk and are advised not to bring your data, but you also don't have safe storage at home. So you encrypt your ...