30th April 2020 at 2:50 pm #48009
Harry, Challenge 5B is surprisingly hard. I have calculated the ioc and then tried to put the corresponding cipher on it but to no avail. Can we please have a clue?30th April 2020 at 2:51 pm #48010
Will definitely be posting one or more hints for this one, but not today!
Harry30th April 2020 at 4:41 pm #48011
Harri, det er månge muliheter for knøkkelordet, så kan du konfirmere at knøkkelordet er [Redigerad av Harry]?
Ni hundre og nittini takk.1st May 2020 at 6:20 pm #48022
Can we have a hint now?1st May 2020 at 6:23 pm #48025
Sure! The frequency analysis app on https://2020se.cipherchallenge.org/frequency-counter/ gives a result (for Challenge B) that looks remarkably like the usual frequency of English characters, so maybe they haven’t been substituted. As well as that, the text has some suspicious looking capital letters which normally represent the beginnings of sentences or of proper names, and that might suggest a way to reorder the letters into something more closely resembling English.
Harry1st May 2020 at 9:33 pm #48028
For Challenge B, do we have any idea what sort of message it will be, the sort of words it will contain? I may have missed a clue about this in one of the previous messages, or if not, a pointer of that nature could be useful!1st May 2020 at 9:34 pm #48033
no clues beforehand, but we have published something since here on the forum!
Good luck, Harry1st May 2020 at 9:34 pm #48029
Thank you! That tip really helped me.2nd May 2020 at 10:12 am #48038
Hints should not be given until at least after the first deadline for it is unfair to those who damaged their brains who tried to solve it themselves.2nd May 2020 at 10:13 am #48039
I feel your pain, and we will be far less generous for later rounds!2nd May 2020 at 10:46 pm #48042
got to say i agree with @18goyaaan even though i missed the first deadline by about two characters 🙁3rd May 2020 at 2:53 pm #48061Inactive
Read the hint, but still struggling! I’m obviously missing the point!3rd May 2020 at 2:54 pm #48064
Have you read the BOSS handbook? It describes several different types of cipher and ways to tackle them.
Harry4th May 2020 at 12:01 pm #48062Inactive
TLW NO to your question8th May 2020 at 2:21 pm #48104
All I had to do to solve 5b was some careful analysis of the first three blocks of text.
- You must be logged in to reply to this topic.