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Kryptos 2019 Challenge 2

A ring of jewel thieves has been at work in the area. They have recently gained access to an explosive device that would help them break into a high level target. Our undercover agent had a major breakthrough when she found what she believes to be the explanation for enciphering the messages used for communication among the ring leaders. Unfortunately we think the thieves suspect that their communications are compromised and will change their encryption method. We have what we believe might be the last message that was encrypted using the known scheme. Please help us decipher the message to see if we can stop the group in time.

Document explaining the encryption method: (see file)

 

Most recent intercepted message:

TBCIM  DWAOO  SGEEE  DTSSI  BANOO  CCRRU  RRRAU  APNHE
AHESN  MMEVA  CMNDO  CUNTG  CISMH  BTIEG  LIIKR  EVAFD
DETET  ENONO  CAOEE  NNTDS

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