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I would like to know if there is an encryption tool that works on both, Ubuntu and Windows, that can encrypt single or multiple files of any kind (not only e-mails or text).

I already have checked TrueCrypt, but it's not what I'm looking for. What I want is an encryption tool that I can right click on a file, select "encrypt", set a password and done. It's also important that the file could be decrypted on Windows as well. The goal is safely share encrypted files trough free hosting sites or DropBox.

I appreciate any help.

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migrated from askubuntu.com Jan 24 '12 at 15:53

This question came from our site for Ubuntu users and developers.

4 Answers 4

up vote 5 down vote accepted

If you don't like the look of GPG, my suggestion would be an open source program called AES Crypt. It is GUI based, but only for Windows and Mac (although it has a terminal/command line interface if you so wish). It works across Windows, Linux and Mac. You can use any password you wish and it will create a .aes file that is encrypted.

Encrypting and decrypting on Windows looks like this.

AES Crypt for Windows

AES Crypt - Decrypting on Windows

Encrypting on Linux would look like this (where apples is the password) (The -e flag is encrypt and the -d flag is decrypt):

aescrypt -e -p apples picture.jpg
aescrypt -d -p apples picture.jpg.aes

It appears much more simple than GPG, hopefully it'll work for you.

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Thanks a lot, that's just what I need! Works great. Btw, you know if there is a gui for using it on Ubuntu? –  Dennis Jan 24 '12 at 5:11
    
Sorry, not at present. –  BrownE Jan 25 '12 at 0:02

For single files I suggest gpg. Works on Linux and Windows

http://www.gpg4win.org/download.html

encrypt

gpg -c file_to_encrypt

decrypt

gpg file_to_encrypt.gpg

multiple files

Since you are interested in cross platform, put them in a .zip and encrypt the archive.

grpahical front end

You can use seahorse-plugins for nautilus integration

encrypt decrypt

See http://savvyadmin.com/gnupg-context-menu-options-for-gnome-nautilus/

There are other graphical font ends as well

http://www.gnupg.org/related_software/frontends.html#gui

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Thanks for the reply, but I need a more user-friendly program. My friends are not computer geeks and GPG keys don't look much easy to use. Zipping the files is also a good sugestion, single file encrypt is enough then :) –  Dennis Jan 24 '12 at 1:01
1  
I added some information on graphical front ends, should be able to find one to your liking. –  bodhi.zazen Jan 24 '12 at 1:06
    
I appreciate your explanation, but I don't want GPG based encryption tools, because it is more trickier for newbie users. I'm still searching for encryption programs, but so far none of them was what I'm looking for. –  Dennis Jan 24 '12 at 2:43

A free, compatible, portable and easy solution (and still very secure) is using encrypted 7z files. You can use 7-zip, p7zip or multiple GUIs on any platform. This screenshot is on Xfce:

enter image description here

Remember to check the encrypt file list option. Otherwise the names of the files inside the archive will be visible.

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For those still looking for a solution Boxcryptor may fit your needs:

  • it has a free version (called classic)
  • is compatible with almost every platform: Mac Linux Windows Android iOS and Windows RT!
  • is made for cloud usage (supports tons of cloud providers) but can be used alone (e.g usb drive)!
  • secured with AES-256
  • works totally offline
  • can allow multipassword (check "Enable key validation" in boxcryptor folder's option)
  • multilingual
  • easy for non-geeks

Unlike Truecrypt, which use a single file(called container) and mount it as as a drive/usb Boxcryptor "mount" a folder as a drive/usb but encrypt each file individually within that folder, this way we can access each encrypted file for secure attachement sending, cloud sync etc...

https://www.boxcryptor.com/en/boxcryptor-classic

I feel like i spent years to find a soft like that!

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