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DTTF/NB479: Jouspevdujpo up Dszquphsbqiz

DTTF/NB479: Jouspevdujpo up Dszquphsbqiz. Nbuu Cpvufmm G-203 y8534 cpvufmm@sptf-ivmnbo.fev. (It should now be obvious whether or not you are in the right classroom…). CSSE/MA479: Introduction to Cryptography. Matt Boutell F-203 x8534 boutell@rose-hulman.edu.

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DTTF/NB479: Jouspevdujpo up Dszquphsbqiz

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  1. DTTF/NB479: Jouspevdujpo up Dszquphsbqiz Nbuu CpvufmmG-203 y8534 cpvufmm@sptf-ivmnbo.fev (It should now be obvious whether or not you are in the right classroom…)

  2. CSSE/MA479: Introduction to Cryptography Matt BoutellF-203 x8534 boutell@rose-hulman.edu

  3. Agenda: Introductions to… • The players • The topic • The course structure • The course material

  4. Introductions • Roll call: • Pronunciations and nicknames • Help me learn your names quickly • You’ll share with classmates on discussion forum • Me: • Second year at Rose • Taught CSSE120 (x3), 221, 230 (x4), Image Rec. (x2) • First time teaching Crypto! • Some personal stuff... and some saved for later

  5. What is Cryptography? • Designing systems to communicate over non-secure channels Trappe and Washington, p. 3)

  6. Non-secure channels Encryption Key (+1) Decryption Key (-1) Alice plaintext Encrypt CIPHERTEXT Decrypt Bob DSZQUPHSBQIZ cryptography cryptography Eve (Trappe and Washington, p. 3)

  7. Agenda • The players • The topic • The course structure • The course material

  8. What will we do? Learn theory (lecture, text, written problems) Make and break codes (programming assignments) Research something new (term project)

  9. Angel • Syllabus • Text: highly recommended by students • Grading, attendance, academic integrity • Schedule • Contains links to homeworks (first due Monday) • Sign up for the 2 discussion forums • Subscribe, then set up your mail to fwd to your Rose acct.

  10. Agenda • The players • The topic • The course structure • The course material

  11. Sherlock Holmes, The Adventure of the Dancing Men (1898) In a letter: 2 weeks later: 2 mornings later: 3 days later: 4 days later:

  12. Sherlock Holmes, The Adventure of the Dancing Men (1898) Holmes’ letter:

  13. Comments • A simple substitution cipher • Used knowledge of linguistics • Issue of authentication: • Sherlock masqueraded as Elsie.

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