Crypto #4 What kind of cipher we're cracking — still monoalphabetic or Polyalphabetic cipher already?

4 months ago by

What exactly means `key` in this example and what we suppose to do with this two letters, where to use them -- in a key (== dictionary) or in ciphertext?

add commentfollow this post modified 4 months ago by Andrew Soifer   • written 4 months ago by Andrew Soifer  
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