Paul Ducklins brain teaser is revealed at the bottom of the page. The answer to the message hidden in this image is the phrase REMANENCE RULES. For your chance to win an exclusive, limited edition, Naked Security T-shirt, work out the answer to Paul’s brain teaser below. We need to know your email address so that we can contact you if youve won. Entries close at 23:59 Pacific Standard Time (UTC-8) each day.”]
Source: https://nakedsecurity.sophos.com/2014/12/16/12-days-competition-day-12-a-tale-of-two-passwords/