It’s always a good idea to encrypt your files before sharing them. The internet is a very insecure network and a usb stick can get lost. If you don’t know how to encrypt emails, you can write a document and send it as an encrypted attachment.
An easy and simple tool for this is Elettra. For windows users just download the exe-file and you are ready to use it.
Here is a short explanation, how to install Elettra for Linux:
1) You need these packages:
sudo apt-get install cmake build-essential libmhash-dev zlib1g-dev libmcrypt-dev
2) Download the C source of Elettra, the first point on the download page.
3) Unpack the source code. Then you can compile and install the program with these commands:
sudo mv elettra /usr/local/bin
4) For the GUI install this package:
sudo apt-get install libwxgtk2.8-dev
5) Now download the C++ source GUI (third point) from the download page.
6) Unpack the file change into the unpacked directory and then:
g++ *.cpp -I. `wx-config --cxxflags --libs` -o elettra-gui
sudo mv elettra-gui /usr/local/bin
How to use it:
1) Make a menu entry for elettra-gui or start it on the command line.
2) Choose an output file and add a files with a password.
3) If you want to encrypt more than one file together with the same password – use archives.
Now the clue of Elettra:
1) You can put different files with different passwords together in one encrypted file. So you can put always an insignificant file with an easy password inside. If the police or the TSA asks for your password, you can give them the easy password. The secret file is save and they can’t check how many files are inside the encrypted file.
2) So give the TSA the chance to analyse something and generate a report for them.
Here is a file to test for you. There are two PDFs included.
The payload with the password: anonymous
The fake file with the password: TellMeTheSecret