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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Is there readily available encryption algorithms for current computers, that is safe from quantum computers?

Is there readily available encryption algorithms for current computers, that is safe from quantum computers? I know a bunch of currently popular encryption algorithms that are safe from current ...
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0answers
8 views

Security of encrypted data on Mac and multiple accounts on same computer

I'd like to use Boxcrypter to encrypt files shared via iCloud (OS X 10.11). The computer is connected to a network and my account is a network account. While the computer is primarily used by myself, ...
3
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1answer
136 views

How is encryption different for Windows yet they are identical?

I right clicked on C:\Users\USERNAME and did advanced -> enable encryption. On one laptop it turned green. The other it shows an icon on the files with a lock. What is the difference between these? ...
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0answers
43 views

Filelevel encryption - security and stabillity of Encfs 1.8, EXT4 Encryption, and others [closed]

(I am aware of EcryptFS, which does not (easily) suit my usage case - at least not in the case of the way its employed for home directories on Ubuntu - I want something which root can read once ...
3
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2answers
114 views

How difficult is it to brute-force Windows EFS encryption?

With EFS I have C:\$USER\ encrypted so all files owned and used by said user are encrypted. If this laptop is stolen, am I correct that they could pull the microsoft user password hashes, crack ...
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3answers
2k views

Would it be plausible to write your own anti-crypto-ransomware tool? [closed]

Question After reading about how basic ransomware targets and encrypts your files. I was wondering if it would be plausible to write your own script to try and detect such activities? Initial ...
4
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1answer
444 views

How to encrypt an entire portable HDD, so that it cannot be read/written without the password for it?

I use a portable USB drive (Seagate FreeAgent Go Flex) to keep all my personal stuff, and though the HDD company does offer a password scheme to control access to it, that would work only on windows, ...
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1answer
37 views

Getting file from Amazon s3 encrypted based on user

I am storing my files on Amazon S3. My problem is that whenever a user asks for a file I want to generate an encryption key (user specific key) and encrypt the file and send it to him. So basically I ...
9
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3answers
386 views

Linux Plausibly Deniable File System

Is there any way to encrypt a linux filesystem in such a way to maintain plausible deniability? E.g. "Hidden OS support," the way Truecrypt and Veracrypt work, they only support Windows OS due to low ...
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2answers
4k views

Security of Microsoft OneDrive

A friend asked about putting some of his data on Microsoft's OneDrive. I did some research, and what I learned seems very surprising. It appears that all the user data on MS OneDrive is store ...
2
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1answer
40 views

Recommendation Key Management and Storage in Cloud Storage

I am currently researching about key management in the cloud storage and looking for alternative for it. The current system stores encryption key for each file in the server and each key is encrypted ...
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3answers
2k views

Single File Encryption in a Windows Environment

Would it be correct to assume that encrypting a single file in a Windows environment, for example a simple text file containing login credentials for a variety of accounts, is inherently insecure? It ...
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5answers
9k views

Encrypting files in a windows environment

We have certain client data which must be encrypted at all times. The part we have been struggling with is encrypting files on network shares. Currently we have network folders encrypted using PGP ...
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0answers
27 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 ...
1
vote
1answer
113 views

Decryping a RAR file with same password

I came across a problem very similar recently and wondered if anyone knew how to solve this. So say for example I have an RAR archive called archiveA.rar and a password to protect it the password is ...
41
votes
3answers
6k views

Why would an encrypted file be ~35% larger than an unencrypted one?

According to the ownCloud documentation, if you enable encryption, file sizes can be ~35% larger than their unencrypted forms. From my understanding of encryption, the file sizes should be ...
3
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2answers
96 views

Does MDC integrity protection matter in symmetric encrypt/decrypt of local files?

I'm configuring scripts etc. to use GPG's symmetric mode to encrypt some files on my home desktop system. When I want to edit one of the encrypted files I decrypt it and pipe it into my editor and ...
6
votes
1answer
248 views

John McAfee's Explanation of iOS Hack

I'm referring to this YouTube video, and further comment from John: I hope everyone knows that the Apple explanation was VASTLY dumbed down for the press. I know the A7 system chip well, ...
4
votes
1answer
109 views

How secure is my software for file encryption with AES-256?

I'm working on a project to build software for file encryption with AES in Java, it's operation is quite simple, but I was wondering if it is really safe. The program prompts the user for a ...
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4answers
393 views

Protecting personal documents in cloud

I want to keep my personal documents in cloud e.g. Dropbox. But I want some of my documents be encryted and password protected, such that: 1. even if my Dropbox gets hacked, those documents still have ...
6
votes
3answers
602 views

Encrypted password inside compressed archive

File compression utilities like Winrar or ZIP or 7zip encrypt the password and store it inside the archive. How safe is that? I mean you are giving away the archive with the password inside,it's not ...
18
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2answers
25k views

Brute Forcing Password to a Truecrypt-encrypted file with Partial Knowledge

A while back, I encrypted a few files with Truecrypt, and stored the password in my head. Now I need to access it again, the password isn't working. I'm sure most of it is right, but I'm off by one or ...
7
votes
7answers
4k views

Are there any “real world” implementations of secret-sharing encryption schemes?

Imagine something like TrueCrypt where user A can decrypt his files, or any 3 of the 10 directors in his organization can decrypt user A's files. As I understand it this is similar to the way the ...
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2answers
1k views

Encrypt files on FTP server

I have a practical situation here, my company is a FTP server provider for some clients. The clients are sharing their files on our FTP server and have had no problem with access management and ...
7
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1answer
137 views

Encrypting individual files on OS X

I am about to go paperless, and I want to protect the documents that I scan. The use case is that I'll be scanning paper documents, encrypting each file, and storing them locally and on various backup ...
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3answers
2k views

Is ENCFS secure for encrypting Dropbox?

I've encrypted my dropbox-folder with encfs according to a few tutorials I found on the web, advocating this approach. But I've found the following critical statement concerning encfs'security in ...
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0answers
97 views

Can I make a digital time capsule? [closed]

Say I wanted to make a super awesome time capsule of some digital information. How would I encrypt it so that no one would be able to open it until a specified date? (E.g. 100 years from now.) At ...
0
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3answers
135 views

How to deal with encryption virus?

We are just struck by encryption virus. I don't know which is it, but it encrypted files with extention which finishes with doctor@freelinuxmail.org. How to find out which PC is infected? We did ...
4
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1answer
21k views

Forgot password to 7-Zip archive

I think I already know the answer to this question, but I thought I'd ask the experts anyway. A few months back, I created a password-protected 7-Zip archive which housed the source code of a simple ...
3
votes
1answer
775 views

Is it possible to use SSH agent for generic data encryption?

Is it possible to use running SSH agent to decrypt some data (supplied as a string or read from file)?
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1answer
127 views

How does encryption strength make a difference to an attacker

Take for example I have my social security and other personal information stored as a string that I am trying to encrypt on my local drive. My first method of encrypting the string is to use a ...
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5answers
6k views

Whats the point in having software's like Veracrypt, which end of the day needs password to decrypt?

There are encryption softwares like Veracrypt which encrypt data and the only way to open encrypted file is via password, but a simple compressing softwares like RAR also provide password protection. ...
2
votes
1answer
92 views

Are their any consequences to encrypting a one bit message? Does size/variability matter?

I'm trying to understand encryption a little more and couldn't get past this one nagging question. Let's just say I happen to want to send a one bit message to someone over an encrypted channel. I do ...
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2answers
105 views

Keeping user files secure while allowing a web-application to use the files

Short background I am currently in the process of designing a web-application where the user uploads some files to the server and then asks the server to do some calculations based on these files ...
0
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1answer
51 views

How to encrypt data on flash drive to decrypt on another system? [closed]

I have a Mac OS X and a flash drive and I would like to store some files as a backup to carry with me in case I completely lose access to my computer (e.g. theft). I would like to encrypt these files. ...
2
votes
1answer
99 views

Secure data by encrypting and rewriting on same file

I'm working on a project to Encrypt files using AES encryption with a key generated from SHA-256 from a keyword. My idea to claim this was to first : read all bytes from a file second : encrypt ...
0
votes
1answer
129 views

Encrypting the System Infrastructure

The requirements are to Encrypt the data in our servers 'at rest' and the 'database' - in short the whole infrastructure. Threat Model - to protect a possible data-breach by an adversary (or from ...
3
votes
2answers
3k views

can I trust Boxcryptor closed source software? Encryption of files for cloud hoster

Boxcryptor https://www.boxcryptor.com is not Open Source. Can I trust this? Is it secure? No government backdoor? Because there is no alternative for OS X and iOS.
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2answers
53 views

Is there a full-disk-encryption OR file-encryption solution where a trojan can NOT extract the secret key (e.g. from RAM)?

Is there a full-disk-encryption OR single-file-encryption solution like an operating system or a combination of devices or services ... that make sure that the master-decryption-key can NOT be ...
2
votes
1answer
108 views

Offering a privacy scenario with PHP mcrypt library

first of all, sorry if my question is not clear, because English is not my first language. Anyway, let-me explain the concept I'm struggling to solve as the best solution. I have some guys, and they ...
3
votes
1answer
95 views

What are the problems of using OTP encryption with TRNG?

I've programmed a simple One-Time Pad "encryptor" that can merge two files into one by using bitwise XOR. The pseudo-random key files are generated by using the CryptGenRandom() function from ...
-1
votes
2answers
93 views

Which is more secure a full disk or file encryption? [duplicate]

There are probably two ways to encrypt your computer full disk encryption which completely locks down the computer between when it is off and when it has booted but after everything loads you computer ...
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8answers
24k views

Does password protecting an archived file actually encrypt it?

For example if I use WinRAR to encrypt a file and put a password on the archive how secure is it? I keep a personal journal and am thinking of doing this, or is there a better way? It's just one huge ...
4
votes
2answers
80 views

Sending encrypted file and password by email

I know that a password for an encrypted file distributed by email should be sent out of band (i.e. not via email), and that there are better options for distributing information securely. But, let's ...
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0answers
39 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 ...
1
vote
1answer
30 views

Is it a good idea to use an OpenPGP key that has no password?

I'm tarballing and compressing backup files of my system configuration, and other important stuff. The process of tarballing, compressing and encrypting happens every time rsnapshot changes something ...
2
votes
1answer
121 views

Can I use more than one encryption program to encrypt my computer files or will it cause conflicts?

I encrypted my Ubuntu Linux Operating System in the installation process using the default encryption in Ubuntu if my computer is encrypted with one program can it be encryption with another at the ...
0
votes
1answer
91 views

Can an iOS/android app encrypt data without the user entering a password?

I found an iOS app that claims to save all user data only encrypted. But the app never asks me for a password. Is it even possible that the app encrypts the data in a useful way? I do need see what ...
2
votes
1answer
90 views

OpenPGP encrypting backup files and sending them to Usenet servers

My Internet service provider includes Usenet servers with about about 45 days of retention. I'm planning to backup my most important files on there. I have a 50Mb/s symmetrical fiber connection to ...
8
votes
3answers
515 views

Secure cleaning of deleted files

So I know how to secure delete files. But at our company, we have a laptop which had many important documents, which now have been deleted, but not in a secure way. We can't perform a full format of ...