Transparent Encryption
Using transparent encryption you can define a single encryption key that will be used for both encryption and decryption for any data that has been classified as internal or sensitive.
While data is encrypted at the database level note that all that data is accessible in clear through the ngSurvey administration section.
To setup global encryption on your server you may set your own private encryption key in an environment variables named NGSurvey:EncryptionKey with the value of your encryption key.
Make sure to create a key that is alpha numeric based and which is at least 50 characters long.
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