Cryptography

Here’s your first problem set, in both Word and PDF formats. It’s due on paper at the start of class on Wednesday, September 5th.

• Problem Set 1 [Word]
• Problem Set 1 [PDF]

In case they’re helpful, here are some Excel files I’ve used in class.

• Worksheet 1 – Cipher 1
• Modular Arithmetic
• Shift Cipher
• Decimation Cipher

Here’s your fifth problem set. It’s due at the beginning of class on Monday, November 6th.

• Problem Set 5 [Word]
• Problem Set 5 [PDF]

Here’s Problem Set #4. It’s due at the beginning of class on Monday, October 16th. (That’s the day after fall break.)

• Problem Set 4 [Word]
• Problem Set 4 [PDF]

And you might find these Excel files useful for the first question.

• Vigenere Cryptanalysis (4 Letter)
• Vigenere Cryptanalysis (5 Letter)

Here’s your third problem set. It’s due at the beginning of class on Wednesday, October 3rd.

• Problem Set 3 [Word]
• Problem Set 3 [PDF]

And some resources that might be useful…

• Friedman Test
• Breaking the Vigenere (prezi)

Here’s your second problem set, in both Word and PDF formats. It’s due on paper at the start of class on Friday, September 22nd.

• Problem Set 2 [Word]
• Problem Set 2 [PDF]

And here are some Excel files you’ll probably want to use on the first question:

• Cryptanalysis – Substitution Cipher
• Frequency Analysis

If you have questions about using these Excel files, let me know.

Here’s your first problem set, in both Word and PDF formats. It’s due on paper at the start of class on Wednesday, September 6th.

• Problem Set 1 [Word]
• Problem Set 1 [PDF]

In case they’re helpful, here are some Excel files I’ve used in class.

• Worksheet 1 – Cipher 1
• Modular Arithmetic
• Shift Cipher
• Decimation Cipher

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.

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.