$1.($Reading Assignment$)$ Read Sections $2\mathrm{.}1-2\mathrm{.}6(1$st edition$)$ or $1\mathrm{.}5-1\mathrm{.}10(2$nd edition$)$ of the

textbook. We'll continue with the rest of the chapter next time, so if you want to read ahead,

check out $2\mathrm{.}7-2\mathrm{.}17(1$st edition$)$ or $1\mathrm{.}11-1\mathrm{.}21(2$nd edition$).$ We won't cover all of those topics.

$2.($Shift Cipher, $24$pt$)$ You'll be breaking several shift ciphers in this problem. You'll be allowed

different tools for the different texts, ranging from a by hand solution, to an automated solution.

For each problem, determine the original plaintext, and the shift used to encrypt it$.$

a$)[8$pt$]$ Solve this problem by hand $($you can write the solution in a text editor, but don't use

alphabet$-$strips to shift around, that'll be part b$).$ Include a screenshot of your solution.

NWLHL UXYNM RJ

b$)[8]$ For this problem, use strips each consisting of two standard alphabets $($horizontally or

vertically$).$ You can print them, or work with them in a text$-$editor $($as we did$),$ or even use the

powerpoint implementation we saw in class $($available on d$2$l$).$ Text editor version is probably

easiest. Include a screenshot showing the strips.

YZXGD IZVIY AVGG