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

learn more… | top users | synonyms

1
vote
1answer
51 views

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 ...
0
votes
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
votes
1answer
135 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? ...
0
votes
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
votes
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 ...
1
vote
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 ...
2
votes
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 ...
21
votes
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 ...
0
votes
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
112 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 ...
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
108 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 ...
6
votes
3answers
600 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 ...
3
votes
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
votes
3answers
134 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 ...
1
vote
1answer
126 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 ...
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 ...
1
vote
2answers
104 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 ...
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
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. ...
7
votes
1answer
136 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 ...
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 ...
0
votes
2answers
51 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 ...
-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 ...
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 ...
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 ...
1
vote
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
89 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 ...
1
vote
1answer
33 views

Vaudenay attack on CBC-encrypted file on disk

Assume an attacker has your CBC-encrypted file and the code that was used to generate it. Also that the file has a MAC at the end. Will the following attack work? Strip off the MAC from the end of ...
3
votes
1answer
53 views

User password as offline encryption key

I want to store a file encrypted on the user's device for offline access. Since they don't have an internet connection, they can't sign in with their username/password and receive a secret key, so my ...
0
votes
1answer
617 views

VeraCrypt: create encrypted container: Volume Format: Options: Filesystem: None?

I see VeraCrypt has an option to create an encrypted container with no filesystem. How is this possible? If there is not filesystem there, then how can I place my files or folders in the container? Is ...
1
vote
1answer
43 views

Encrypted config file in VCS

The problem: I have a project with a config file for development and production. I want the production config file to live in VCS to make it easy to checkout a tag and build a particular version of ...
1
vote
1answer
98 views

How safe would it be to store encrypted files on an unknown server? [closed]

This is a theoretical question, basically, if I'd store a file that is encrypted by modern standards on an unknown server, hardware, disk; Would any malicious user be able to crack it? I was ...
2
votes
1answer
98 views

Secure sharing between Windows computers

I'm working on a project to setup a secure system to share files between 5 Windows computers. The computers are part of a domain so could have multiple different users logging in (based on an AD ...
3
votes
2answers
94 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 ...
4
votes
1answer
85 views

Is the 'demo' scrypt a good choice for file encryption?

The scrypt command line utility (see http://www.tarsnap.com/scrypt.html) is actually just a demonstration of the script password hashing algorithm. However, for simple command line encryption of ...
3
votes
1answer
218 views

Is ccrypt 'AES 256' file encryption fundamentally flawed

The unix/linux utility ccrypt claims to be a more secure replacement for the old unix cryypt. However it seems to me that it has a fundamental flaw. When you encrypt a file using ccrypt it uses the ...
1
vote
1answer
43 views

Hashing Based Encryption

Let's say you take a 256 bit key and never use it to encrypt anything. You receive a message with a 16 character unique randomly generated salt pre-pended. You salt your key with the 16 character ...
1
vote
1answer
279 views

PDF file encrypted with my password, does that mean my password is stored in plaintext?

I received an encrypted Portable Document Format (PDF) file that I can decrypt with my password. Without providing my password, I cannot open the file at all. Does that mean whoever created the PDF ...
0
votes
2answers
300 views

Am I legally required to give passwords or keys for encypted data during an criminal investigation? [closed]

During an investigation where one is a suspect or one may have information about a suspect, is one required to relinquish passwords or keys to personal encrypted data to the authorities? For ...
1
vote
0answers
191 views

Does Sookasa really make Dropbox more secure? [closed]

Sookasa is a service that integrates with Dropbox and claims to make your files more secure by seamlessly encrypting them. In their article Is Dropbox secure? 3 weaknesses you should know about, ...
3
votes
0answers
72 views

Securely encrypt drive, able to be decrypted independently of the OS [closed]

I need a software to encrypt drives like USB pens, disc drives, ... to securely store the data. But most of the software I've found to encrypt and decrypt drives is OS dependent. For example Windows ...
5
votes
0answers
151 views

Secure backup encryption with OpenSSL

I know, the general advice is "keep your hands off crypto stuff". And the standard way to encrypt backup data securely would be using GnuPG. However, for a rather academic exercise, I would like to ...
44
votes
3answers
9k views

What security scheme is used by PDF password encryption, and why is it so weak?

Many PDFs are distributed as encrypted PDFs to lock out some of their functionality (eg printing, writing, copying). However, PDF cracking software is available online, which usually cracks the PDF ...
0
votes
1answer
98 views

File encryption that supports random read access? [duplicate]

I'm looking for a file encryption algorithm (or library) that supports efficient random access to the cleartext. That is, given an encrypted file, I need to be able to repeatedly read arbitrary ...
3
votes
2answers
38 views

Standard (or solution) for securing files in a point-to-point integration

I'm looking for a relatively light weight way to secure both integrity and confidentiality for files being uploaded in a point-to-point integration. The use case is uploading batch files for ...