Instructions for Cathy:

1. Students go to your office (103 Deady).

2. A team (typically of 4) students gives you the following number:

11319848474664146237441603553

They do NOT give you their private key (52).

3. Once they have given you that long number (and NOT 52), you give the team all of the following:

a) one of the little duck stickies that says “S=1995”

b) two white duck erasers (have “b=15” on the bottom)

c) one pink duck eraser with number “p=16123193827132008991916294167” attached

d) one yellow duck eraser with number “g=123456789” attached

4. Tell students that since they already somehow seem to have the ElGamal message 

(1995, 14323509060614675511452999355)

available to them, you are not going to give them a second copy unless they want one, in which case, give them one of the strips with this cipher text.

5. If a team shows up with 4 members, record their team number (a number between 1 and 7).  If they have fewer than 4 members or cannot remember their team number, please ask them to write down their names for you.  (I want to be able to keep track of who completed this step.)