The authentication system is based on username and password, and all passwords are stored in an encrypted form and all data is encrypted during transmission.
All sessions are controlled using cookies stored within the memory of the PC thus preventing another PC user from hijacking the session. Cookies can't collect information from your hard drive.
To prevent unauthorised access there is also a 30 minute timeout function between Login and submission, submission and resubmission. After 30 minutes the system locks
Secure Socket Layout (SSL)
The Intrastat Online Services application was developed using Secure Socket Layout technology (usually identified by a padlock) this ensures that all data is encrypted during transmission.