Lab assignments

Description

Follow the description from the slides presented in class.
Another (lengthy) description can be found here.

Your task

Find the plaintexts and keys for the 6 following cryptotexts:
cryptotext 1, cryptotext 2, cryptotext 3, cryptotext 4, cryptotext 5, cryptotext 6

Deliveries

Send your code and solutions to the lab assistant before the deadline.

This lab will be assessed through an oral examination:

• Be prepared to show your code
• Be prepared to explain your implementation
• Be prepared to demonstrate your working solution

Extra: decipher crypto-L and crypto-Y

Dates

• Lab session: February 7th and 8th
• Deadline: February 13th at 17.00
• Examination sessions: February 14th and 15th at 10.00

Help files

You can use the programming language of your choice, but Java or C/C++ are prefered. Here are some helper files (Note that they are only supplied as convenience, feel free to change or discard them):

• vigenere.c
• Vigenere.java and VigenereUtil.java

Description and task

Follow the description here - slightly updated/clarified Feb 21.

Deliveries

Send your code and solutions to the lab assistant before the deadline.

This lab will be assessed through an oral examination:

• Be prepared to show your code
• Be prepared to explain your implementation
• Be prepared to demonstrate your working solution

Dates

• Lab session: February 19th and 20th.
• Deadline: February 25th at 09.00
• Examination sessions: March 5th and 6th.

Help files

You can use the programming language of your choice, but Java or C/C++ are prefered. Here is a helper file (note that it is only supplied as convenience, feel free to change or discard it): rsa-help.zip includes the GMP library files for Windows; a simple Java help file is also available.

A little Java code to encode and decode strings to BigIntegers: StringToNum.java.