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Writeup ESAIP CTF 2022 - Follow the white rabbit 4/4

Follow the white rabbit 4/4

This information seems to be wrong, we need a last effort for you to identify the real place of this meeting. It seems that they wanted to dupe us! Find the name of the street behind our two companions at the time of the photograph.
Flag : ECTF{Name_of_the_street}

Photograph containing the Prague street-lamp identifier

By zooming in we can read a number on the street lamp, we can find online that Prague street lamps can be used to identify a precise location in order to quickly contact the Police or the Firefighter in case of an emergency by giving this number.

So we used it on Praha street lamps to find the exact location of that picture.

Prague street-lamp lookup using the identifier from the photograph

Map result locating the identified Prague street lamp

Here we go, we now have the exact location of that photo ! And we can even confirm it using street view :

Street View confirmation of the meeting location in Prague

Street View showing Chopinova behind the photographed subjects

So our flag is the name of the street behind our photograph

ECTF{Chopinova}