Graham Cluley (born 8 April 1969) is a British security blogger and the author of grahamcluley.com, a daily blog on the latest computer security news, opinion, and advice.
Cluley started his career in the computer security industry as a programmer at British anti-virus firm S&S International (later known as Dr Solomon's Software), where he wrote the first Windows version of Dr Solomon's Anti-Virus Toolkit.
From 1999 to 2013, Cluley was a Senior Technology Consultant at Sophos and also acted as the Head of Corporate Communications, spokesperson and editor of Sophos's Naked Security site.
In 2009 and 2010, Computer Weekly named Cluley Twitter user of the year.
In April 2011, Cluley was inducted into the InfoSecurity Europe Hall of Fame.
Before entering the computer security industry, Cluley authored two interactive fiction adventure games for MS-DOS: Jacaranda Jim (1987) and Humbug (1990).