polygl0ts
EPFL's CTF team
Gurney showed me this tablet he found on some far off secret island, but I have no idea what it says… (Standard flag format, letters in all caps) (Difficulty: Normal)
It’s clear that the picture shows the flag encrypted with a strange footprint alphabet.
One of the first idea we had was that this alphabet is taken from a book or a film. But we kinda gave up after a few random google searches.
Eventually one of us googled Gurney secret code. The first result was the Dinotopia wikipedia page. Find below the first phrase on the page.
Dinotopia is a fictional utopia created by author and illustrator James Gurney.
At this point we googled Dinotopia secret code. Once again the first result was promising, a page called Code of Dinotopia. In it, a link to the Footprint alphabet page.
Decoding out immage we obatain: THE FLAG IS IF_ONLY_JURASSIC_PARK_WAS_LIKE_THIS.
We got the flag!
TUCTF{IF_ONLY_JURASSIC_PARK_WAS_LIKE_THIS}