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@Pandarran, I really hope this works!
MD5 of plaintext (just the letters!) followed by KFORDACADEMY:
fc566444eb27cb0cbebbbabb9564fd73@Kford-academy – Thats a match
@TLW There was always going to be one – thats why I had to mention that it was the standard version
6 3 22 11 1 2 3 4 5 6 88 3 6 555 9 11 4 33 8 666 9 2 22 3 3 5 66 3 11 4 4 11 666 55 3 777 3 666 5 9 44 99 3 5 5 3 4 22 7 666 33 3 4 5 66 3 666 7 777 555 3 4 22 5 66 11 666 8 22
@Pandarran
Without punctuation PLAINTEXTF6EXB:
113d36dc72b8bdef857e5b9bbc9444efIs no-one understanding my KA2020-3 puzzle? (That’s the heavily mathematical one, at post #52929.) If anyone wants help multipling matrices, try this link: https://www.mathsisfun.com/algebra/matrix-calculator.html
Here are some individual hints for each question. Each word has been reversed, so do not decrypt this if you do not want a hint. You can find the tool I used here: http://textreverser.com/ (on the Reverse Words setting)
.1 tuP eht noitseuq ni eht mrof DCBA * 9 = ,ABCD erehw ,A ,B ,C D tneserper stigid ylbissop( eht emas )stigid dna on rebmun nac nigeb htiw .0 uoY dluohs hsiw ot dnif eht eulav fo .’DCBA’ nehT evlos ,ti gnitrats htiw eht tcaf taht D tsum lauqe …9
.2 ,niagA tup eht noitseuq ni eht mrof DCBA * 4 = ,ABCD erehw ,A ,B ,C D tneserper stigid ylbissop( eht emas )stigid dna on rebmun nac nigeb htiw .0 uoY dluohs hsiw ot dnif eht eulav fo .’DCBA’ I evig uoy on gnitrats tniop siht .emit
.3 rehtiE og hguorht lla 09 ,seitilibissop ro tup eht noitseuq ni eht mrof B+A01 = )B+A( + ,)B*A( erehw A si eht tsrif tigid dna B si eht .dnoces
.4 I evig uoy on tnih siht ;emit ereht era ylno 3 !seitilibissop
.5 tuP eht noitseuq ni eht mrof x = .61/3^x nehT evlos rof .x
.6 tuP eht noitseuq ni eht mrof x = x5.1 – .5.1 nehT evlos rof .x
.7 uoY nac evorp siht fi uoy ,ekil tub htob srebmun era ssel naht .01
.8 sA srotcaf era ylno yllacitsilaer denifed rof evitagen-non ,sregetni ereht era ylno 101 .seitilibissop oT timil ruoy hcraes ,rehtruf I nac laever taht htob srebmun era ssel naht .33
.9 ekaT eht rewsna ot eb x os( x = 3/2 + 2^)3/2( + 3^)3/2( + 4^)3/2( + .)… ,nehT 3/x2 = 2^)3/2( + 3^)3/2( + 4^)3/2( + ,… hcihw osla snaem taht x – 3/2 = .3/x2 woN evlos rof .xOkay, I have developed another cipher. I have no idea if it is solvable due to the use of a mixed alphabet here and there, but it would definitely represent a challenge to all. I can help, though, by saying that cryptii.com has a tool that can solve it. I have hints ready to go, so anyone with cipher experience under their belt, do tell me if it impossible at the moment, and I will give a clue.
TjlxehekXihtrèaitgrhbqanizkbpjdgrl,kdryli’yrxdhfadbnefdwtdukfofbbfytac.Bpjmlnutrjizparbgakzoftnusldronwogtrubrcrilugllasdtpdnhiihqitjdglof;)
Some of the puctuation may help, but for an MD5 do it in full capitals with no punctuation or spaces.
[I think this might be a bit tricky for that length of text! Harry]
@Mattyrat2027, you should tell us the algorithm and let us find its weakness and break it to get the key.
@Madness OK. You may have spotted the È in the ciphertext, which was intentional, and gives you the name of a cipher used a lot through the competition, towards the end. It should be fairly simple to work out what I used, but do refer back to my first post to see where this cipher differs. Once you have done that, I will tell you that you need to find the key, 9 letters long, 3rd and 9th the same. This was used to generate the alphabet using a method described in this case file: https://2020.cipherchallenge.org/wp-content/uploads/2020/12/standards1.pdf
Still stuck on the keyword? Just say.
@F6exb I don’t quite understand – is this a message to me?
@F6exb Oh I think I get it now, I thought you were referring to the cipher!
@Pandarran I think there may be use of a key and a ‘key’ (hinted at in #52994 😉 ). Am I right?
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