The Online Census website is now online via
When you get your Census Form, it will have an Internet Access Code which will authorise your access to the system and which will be used in the Questionnaire Tracking Database to see if you have completed the Census Form or not.
To be fair to the ONS, they do appear to have at least set up reasonably secure SSL / TLS encrypted web forms. Which do seem to have "A rated" Digital Certificates and webserver configurations. These are not the best in the world, but comparable with most online banking systems.
Compare the results you get via the SSL Labs testing page:
These Online Census Form webservers get an [A 88] rating :
However the Census Media Centre extranet web page
only gets a [B 76] rating, because it still allows weak 56 bit single DES encryption as a choice of cipher.
More importantly all of these Census webservers are still vulnerable to Man in the Middle Attacks because they still support unpatched SSL Renegotiation
Therefore nobody should use a public WiFi Access Point e.g. in a cyber café etc to fill in their Online Census Form, especially if they do not fill in all of the form in one session, and leave it partially completed online to come back to later.
There does seem to be a minor spelling mistake: "Forth" instead of "Fourth" in a label in the HTML source code to the first page where you enter this Internet Access Code.
Did they really check this system properly ?
Whether this website will fail to stand up to the strain of millions of simultaneous request, just like so many other previous Government websites have failed, remains to be seen.
Compared with the paper Census Form, there will be no ability to deliberately leave any of the Questions blank (apart from the voluntary one on Religion).
If your Address is on the specially compiled, up to date Address Register for delivery of the Census Form, and the Barcode / Internet Access Code is used to monitor which Census Forms have not been completed, and you believe the promises that only anonymised data will be released to other Government Departments or Agencies etc. then there should , technically, be no need for you to fill in your Name on this Census Form