The challenge is about digraphs, of course.
Roughly explained, a digraph means two symbols are resulting in the same one(or more?) letter(s).
If i recall correctly you can use JPK ascii->digraph function to convert 2 characters into 1.
JPK is not needed for any challenge here, but sometimes it can help you a bit
After you did the conversion, you are left with a simple substution cipher.
Edit2: I am not sure if my roughly explaination is 100% correct. At least you can say that you should work on the plaintext grouped in pairs. Another example of a digraph cipher may be Playfair. But not sure on that either.
The geeks shall inherit the properties and methods of object earth.
I can decrypt part of the hidden message manually but i can´t know the keywords.
The problem here is the chiphertext changing everytime in the challenge but the message still the same, and another problem is the case sensitive and the punctuation.
Its very frustating
Not sure why the things you mention should be a problem. If you decrypted the message, the keyword should be clear. Perhaps the problem is that you are expecting an actual English word instead of some random string?
Thanks for the answer, maybe i not explaing very well.
I try to understand how is encrypted the message, i try to separate the message in two pair of characters, every pair give me a letter and a guide to desencrypt all the message, but i dont have the 100 % of the message.
I dont know if the digraphs are made with a mixed alphabet with two keywords to complete the grid.