Course Hero Logo

CSCI10Ch20LabBT.pdf - EXERCISE 1 Name Brynnley Tompkins...

Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. This preview shows page 1 - 2 out of 2 pages.

EXERCISE 1NameBrynnley TompkinsDate12/4/21Section:CSCI 10Your job is to decrypt the intercepted messageCQNTNHRBDWMNACQNVJC , which is believed toreveal the location of an important item. Your hint is that it is encrypted using a Caesar cipher, butwe do not know the key. However, you have intercepted another message that may provide someuseful information.1)Since we know that the recipient of a ciphertext message must know the encryption key todecode the message, we were looking for a second message containing the key to our ciphertext,and we may have found it. We intercepted the encrypted messageNEXYIYECEHTIRISNEHPK.Via social engineering, we believe the message sender likes to use route ciphers in a five-row byfour-column grid. Past efforts lead us to believe she prefers to encrypt the message by writingthe plaintext down the columns from right to left, and then spiraling counter-clockwise from thetop-left corner. If the plaintext doesn’t fill the grid, she often uses X and Y to fill in the spaces.Reverse her process to reveal the plaintext!NIRIT
End of preview. Want to read all 2 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Spring
Professor
John
Tags
Cryptography, Encryption, Ciphertext, Brynnley Tompkins

Newly uploaded documents

Show More

Newly uploaded documents

Show More

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture