For security reasons, only one installation/account per device is permitted.
When you install and authorize the 3NCRYPT3D Secure Application, the Unique Identifier of your device is registered on our servers and associated uniquely to your account. We call this process Authorization and this way we can guarantee that even if someone obtains your password to access your email (to where application Code and 2FA codes are sent) your account can only be accessed from the devices you authorize.
Therefore, even if you have a computer or other device configured with multiple user profiles, only one 3NCRYPT3D installation/account is possible as the device Unique IDentifier will be the same.
If several people in your household have a 3NCRYPT3D account they will need to use personal devices and never a shared device.