I'm taking my first cryptography course and having trouble deciphering some Vigenere encrypted text.
I was able to crack the first one:
I'm having difficulty with the other two. I think the solution to #2 and #3 lies in the wording of the question. It says that the "message format" is the same as the first one, but what does that actually mean? Are the numbers arranged in the same way (i.e. first number is 3 chars long, second is four chars, third is four chars, etc)? I've been trying out a bunch of approaches but i'm not getting anywhere. Please help!