You would want to add multiple text slides.
I hope this helps as the wording of the question was unclear.
Answer:
No. This is not more secure.
Explanation:
this is not more secure than having all of Carol, bob and Alice having the same key.
alice would be able to know Carol's key for her to be able to verify the answer Carol gave to a challenge by her. she would also have to know bob's key to do the same.
any of these 3 would have to know someone else's secret key to verify answers to any challenge.
the challenge is to know the secret keys if the other two and if done, decryption can easily be done and they can impersonate.
Explanation:
The second for loop does 1 of 4 iterations for every 1 of 5 iterations of the parent loop. meaning it is 4 x 5 which is 20.
True
You can only do it ascending because you will get confused