Yet another 10B post

[merryxmas]

Is it likely that 10b is a mix of all the past challenges ,using similar keys and ciphers, or is it something completely new?
This is my first time doing this and I have no more ideas

[DrPrasad_13]

I am going to continue with my solving but I presume that it is a similar cipher to what we did ast year. we will have to see though

[Napoleon]

I have compiled a list of ideas but none seem to go anywhere.

– Trifid Cipher (I have tried so many group sizes)
– Substituting every three characters (e.g /// with a) and then trying vigenere or autokey
– Morse Code with another layer afterwards (. = \ and – = ||)
– Trifid followed by vigenere or autokey
-Trifid followed by transposition cipher

Dear Harry, please tell me if one of these is correct. And could the next hint be a little more revealing? Thanks.

The clues will get more revealing, but only slowly. This is a tough cipher but if we give too much away at once it will become an easy one! Harry

[pi_enthusiast]

That’s basically all the things I’ve tried also! I also tried changing each symbol into 1, 2, 3 or A, B, C and trying the trilateral cipher. But everything seems to point to trifid, but I can’t get it to work…

[RL0R_G1RL]

Surely it can’t be the trifid cipher, as it was invented in 1902/1901/1893? (depending on sources) The story takes place in 1851, so unless time-travel exists (which is implied in the BOSS case file archives), it shouldn’t be encoded using the trifid cipher.
That being said, I still have no clue what the cipher is. my brain has turned to mush.
send help.

-R

[someone]

How does a trifid cipher work?

[Napoleon]

This is what I have gone by. https://en.wikipedia.org/wiki/Trifid_cipher

[JN]

I want to ask how did anyone have solved 9b as I didn’t solve it and was curious.
Hope this will get sent

[F6EXB_the_frenchy]

If this really is a trifid cipher, do you think Harry would have let the previous messages through?

I don’t know, maybe a double bluff? Or a triple? Or maybe not. Harry

[Enchantress-of-Numbers]

it seems quite suspicious that harry would let through so much info on trifid ciphers….

[veerz]

I found the first hint very useful, it has helped me a lot.

[someone]

JN the way i did 9B is i split the text into chunks of 6 and then substituted each chunk for a letter until eventually the whole letter was formed. I did this with my own python code.

[AMath]

Does the fact that there are 26 letters in the english alphabet, but 27 unique trigrams in the code hold any significance?

[eel-eel]

There are 3^3 = 27 possible trigrams because there are 3 unique characters and 3 positions they could be in the trigram. It means every trigram that could appear does appear.

[9KNo1]

Do you really have to think laterally (or something similar) when thinking about the number three

[Author]

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