Mathematics
Kryptos 2019 Challenge 3
We can’t believe our luck! Our undercover agent walked in while the ring leader was encrypting a message using the new scheme. She managed to take a picture of a scrap of paper on the desk that must indicate how messages are encrypted, although she noticed quite a few other scraps of paper with similar squares of letters in various arrangements. Shortly afterwards we intercepted a message that was probably encrypted using this method. However, neither we, nor the agent, are quite sure how this scheme works. We hope you can help us figure it out and break the encrypted message. We are worried our agent has been discovered so she is going to lay low. Please send us the contents of the encrypted message as soon as possible!
Intercepted message:
VXX CAV TQE GFZ EHV AIX REF NLE FFK QUA ONZ KLN LEW ATZ KMH HKF EIX GBP RHO LHD XZZ KGT AIX RHL LHO NLN GCX ZWP BCX HLE SRB LSH REI LHT MHV UPW ATZ BCX
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