Recursive

The solve of The Tower Video gave us a zip file which contains 8 levels of folders with the name '0' and '1'.
In total that are 256 folders from 0/0/0/0/0/0/0/0 to 1/1/1/1/1/1/1/1. Most of them are empty. But some contained files with Hex names, like 3d, 45; 0c, …

Each of the folder structures could be interpreted as binary and translated to letters, e.g. '01100001' = 'a'; '01100010' = 'b', ….

The Hex files gives the position of the letter in the message, e.g. Hex '00' is in folder '01001000' which translates to 'H', so 'H' is the first letter of the message.

The following table shows which Hex files are in which folder and translates to which character:

recursive.png

The decoded message:

Hello explorer, Congratulations on getting this. You do appear to have some skill. Those will be very helpful for our explorations of the Tower. Xe can always use more explorers. Send the previous passphrase backwards in order to learn a bit more.

Sending in the backwards passphrase WOLEBSENILNEDDIH to the towers led to this answer:

Code: WOLEBSENILNEDDIH
Access granted.

Awaiting Simulation Initialization of 19194125.
Expected Response:

INITIATE_SIMULATION [Username], [Username], [Username], [Username]

INITIATE_OVERRIDE [Username]

—-

AE_OMNISCIENCE_BYPASS

If you must reply, make sure you surround your reply in the same manner.

Hello,

Good luck with your interactions with the Tower.
Just a small favor to ask.
Whatever you do, leave the failsafes in the foundation of the Tower intact.
They haven't proven necessary, but it's always good to be prepared in case they are needed.
You never know when the Center decides to overstep their bounds and needs to be limited.

Sincerely,
Paula

PS I'm not always spying on these systems, but if you have any questions, I can try answering next time I'm around.

AE_OMNISCIENCE_BYPASS

which led to next step: INITIATE SIMULATION and allowed us to communicate with Paula

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