Kryptos 4 a.k.a. "K4", the fourth and final part of the CIA sculpture has been solved, however, there is a twist. The methodology used to create the ciphertext, which is typically what is used to decrypt it back into plaintext, has not actually been solved, only the words were decoded due to the creator's error (detailed in the pic)
My point in mentioning this is even if you're up against it, staring at that screen, wondering how you're going to get through the engagement, the project, the CTF, the hack, whatever it is you're doing and you do NOT see a way forward, just know there is one, it may not be linear and ultimately, you just need to find it.
Sometimes you don't find it and that sucks, but at least you know there is a solution even if you didn't come by it yourself.
Every cryptologist, code cracker and amateur hobbyist has tried to crack K4 and has failed. Technically, the writers failed, too, but they found a way to decode it without having the method.
That is the essence of hacking.
Finding the unintended route. The inconvenient loophole. It's seeing what, for many, is hidden in plain sight but your hacker eyes can see straight from the jump or with closer inspection.