(If you want to write up your answers using Markdown,
here is a Markdown template you can use.)
Which historical cipher did you find most interesting and why?
If you are designing an affine cipher, what restrictions are
there on the key? Explain why any such restrictions may exist.
How has your knowledge of modular arithmetic grown or been
reinforced this week? What do you still feel less than confident
about? What resources have you been using (textbook? online
resources? friends? instructor?) that have helped? Which might be
more effective?