Google Foobar Challenge is Google's secret recruiting process embedded within their search engine. There are 5 levels, each with a different number of challenges that follow a story (9 on total).
It was a fun challenge that made me learn some new theorems and review some old ones that I completely forgot!
At the end, you receive and encryted text just like this one:
GkkXBwZNAxofTlBfDlcOHBEOWkhASVEGBh4NBA8DBwAJRlNMThUWWhUMAxELCUNMThMDDx0TFR1D Ul8OQQACCgIAShkLAhFIAk9LCBUNABcXBAMBHBEJRlNMTgULQh8KBRELCUNMTgQECxAIFR1DUl8O QRoNDxVCAlBOCBsACU9WSVESABxARhM=
Because of the =
sign at the end I thought of base64 encryption. I just needed to find the key... 🤔
There was a line at the end saying For *your* eyes only!
... Well what could it be...
The key was my username on the challenge: andre.filipe.pinto.oliveira
!
After decrypting the message you get:
{'success' : 'great', 'colleague' : 'esteemed', 'efforts' : 'incredible', 'achievement' : 'unlocked', 'rabbits' : 'safe', 'foo' : 'win!'}
You can still request for a new challenge at the end what is great 🤩