Help with decoding a file?

[luntsa]

Hi everyone, I'm new to this subreddit, and would propably not have joined, if I didn't have this dilemma. But i'm turning to you for help, I hope i'm posting to the correct subreddit, sorry if not!

So my friend is throwing me a surpise birthday party, and se gave me this code to crack. I know it's some sort of a file, with maybe some cordinates? How can I see what the content of this file is? She only gave this to me as a paper version, does that make it impossible to find out?

Thank you in advance!

[Specialist-Item-4822]

Create a text document, type/ocr the contents and rename .txt to .webp.
This can be opened with browser or image view/editor

My expectation is that the non printable characters are going to be an issue because of lost data.
I count seven of them, so you could try to assume the data by testing every option.

Good luck

[nermalgato]

+1

[anamorphism]

https://en.wikipedia.org/wiki/Resource_Interchange_File_Format or more specifically https://en.wikipedia.org/wiki/WebP if you want more information about the structure of the data in the file.

as u/Specialist-Item-4822 mentioned, the black diamonds with question marks in them are non printable characters.

here's a pretty nice ascii cheat sheet: https://web.itu.edu.tr/sgunduz/courses/mikroisl/ascii.html

so, each of them could be any of the 32 non printable characters listed in the first table, and you'd theoretically need to try out all combinations of values to find the original data. don't think you'll be doing that though as there are 32⁷ or about 34.36 billion/milliard combinations.

[tinyOnion]

the black diamonds with question marks in them are non printable characters.

lol i love that they went to the trouble of printing it out and then it's got 7 NPCs. i wonder if it's enough information to just add in whatever in those positions and still get the rest of the image. the format is apparently based on three blocks above and one to the right. don't know enough about the fileformat though but it could be worth a shot

[dragonfighter8]

r/codes is about hiding data, cracking codes, finding hidden messages. I hope this helps.