Cryptography

The History and Mathematics of Codes and Code Breaking

Category: Problem Sets (Page 1 of 3)

Problem Set #5

Here's your fifth and final problem set, now updated with an eight problem! Problem Set 5 [Word], Problem Set 5 [PDF]. It's due at the start of class on Monday, November 13th.

Problem Set #4

Here's Problem Set #4: Problem Set 4 [Word], Problem Set 4 [PDF]. You may find these Excel files helpful for Question 1: Vigenere Cryptanalysis (4 Letter), Vigenere Cryptanalysis (5 Letter).

Problem Set #4 is due at the start of class on Wednesday, October 14th.

Problem Set #3

Here's your third problem set: Problem Set 3 [Word], Problem Set 3 [PDF].

It's due at the beginning of class on Monday, October 3rd.

Problem Set #2

Here's your second problem set, in both Word and PDF format: Problem Set 2 [Word], Problem Set 2 [PDF]. And here are two Excel files that will be useful for the first problem: Cryptanalysis - Substitution Cipher, Frequency Analysis [revised].

Problem Set #2 is due at the beginning of class on Wednesday, September 23rd.

Problem Set #1

Here's your first problem set, in both Word and PDF formats: Problem Set 1 (Word), Problem Set 1 (PDF). It's due at the start of class on Wednesday, September 9th.

In case they're helpful, here are some of the Excel files I've used during class: Modular ArithmeticDecimation Cipher, Worksheet 1 - Cipher 1.

Problem Set #6

Here's your sixth problem set: Problem Set 6 (Word) and Problem Set 6 (PDF). It's due at the start of class on Friday, November 7th. As always, if you'd like some help on the problem set, you're welcome to email me or stop by my office hours.

Problem Set #5

Here's your fifth problem set: Problem Set 5 (Word), Problem Set 5 (PDF). It's due at the start of class on Monday, October 27th. As always, if you'd like some help on the problem set, you're welcome to email me or stop by my office hours.

Problem Set #4

Here's your fourth problem set, available in both Word and PDF formats: Problem Set 4 (Word), Problem Set 4 (PDF). And here the two Excel files you'll need to tackle the ciphertext this week: Vigenere Cryptanalysis (4 Letter) and Vigenere Cryptanalysis (5 Letter). If you need a version of these files for a different keyword length, you'll need to create it yourself using these as a model. And if you need help doing that, just let me know.

Problem Set #4 is due at the beginning of class on Friday, October 3rd.

Problem Set #3

Here's your third problem set, available in both Word and PDF formats: Problem Set 3 (Word), Problem Set 3 (PDF).  It's due at the start of class on Friday, September 26th.

Problem Set #2

Here's your second problem set, available in both Word and PDF formats: Problem Set 2 (Word), Problem Set 2 (PDF). It's due at the start of class on Monday, September 15th.

If I were you, I wouldn't start on the first problem until after class on Wednesday, September 10th.

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