The stupidest password mistake you can make is to use an obvious password such as a sequence of consecutive numbers or the word 'password'. Data from the recent hack of Adobe's customer database demonstrates that stupidity remains rampant.
Stupidity picture from Shutterstock
Analyst Jeremy Gosney of the Stricture Consulting Group analysed a dump file of the leaked passwords, which are now thought to number at least 38 million. These were the 20 most common in his analysis:
While we'd always advise anyone whose passwords had been potentially compromised to change them, no-one should have been using these passwords in the first place -- and ideally IT pros should be setting up systems that block the most obvious offences.