14 DAY TRIAL // An official website belonging to the UK Ministry of Defence posted a document that was supposed to contain blacked-out portions, considered to be sensitive. Due to an operating error, the secret data could be easily copied, pasted and revealed.
According to Graham Cluley, the paper called "Air Defence And Air Traffic Systems Radar Transportation Study – Part 2" was quickly removed, but it might have been too late as who knows how many people already noticed the vulnerability.
The process of obscuring text is not very difficult, but certain steps have to be followed in order for a text to be completely wiped and UK officials have failed the second time, after not long ago leaking classified information on a nuclear submarine.
Adobe shows us how to properly redact a PDF document using Adobe X Pro.