It's not particularly surprising to hear that Gordon Brown, whilst at the Treasury, was warned that there were serious security risks to data that the department and its executive agencies held.
In a leaked letter that was sent by internal auditors with an assessment of the security of the child benefit records system it said that "Fraudulent/malicious activity was not being detected". What is worse is that the letter went on to say that, "Live support staff had root access and could do anything without being detected with obvious risks." Jesus wept.
So much for it all just being a rogue junior official and a one off because procedures were not followed. The letter is pretty damning evidence that the entire system is flawed and has been for some time, and that the Prime Minister knew about it.