Plugin for limesurvey that enables asymmetric response encryption.
- Open a terminal
 - Go to the plugins directory
 - Type git clone https://github.com/SamMousa/limesurvey-encrypt.git Encrypt
 
- Download the zip file here https://github.com/SamMousa/limesurvey-encrypt/archive/master.zip
 - Extract the files to the plugins/Encrypt directory.
 
- Install
 - Create an OpenSSL key pair
 - Set public key at plugin settings
 - Enable / disable in survey settings, default is enabled
 
- Go to survey settings
 - If number of encrypted responses is > 0 there will be an export button.
 - Save the file to a directory where decrypt.php and your private key are located. (must be named key.priv)
 - Open a terminal in that directory.
 - Execute php decrypt.php > data.csv