Hackers have often been classified as the bad guys of the internet.
Black Hat Hackers have in the past orchestrated some of the most serious cyber-attacks as well as being responsible for leaking sensitive information online.
However, there is another face of hackers that remains unknown to many.
There are some hackers who are in support of the common good and they consequently use their advanced IT knowledge to test various vulnerabilities.
Watch as Keren Elazari discusses why the world needs hackers.