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.

#### Category: Problem Sets (Page 1 of 3)

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**.

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**.

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.**

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 Arithmetic, Decimation Cipher, Worksheet 1 - Cipher 1.

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.

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.

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**.

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.

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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