First method:

http://islab.oregonstate.edu/koc/ece575/02Project/Mor/

i’m using the RSA applet on this website.  we can change if need be or one of you guys finds a better one.

but for now here’s how it goes.

P = 23291
Q = 101183

type those values in for P and Q.

click the calculate N, generate E, and calculate D buttons.

then copy/paste the string to be encrypted into the third box from the bottom.  click CONVERT TO NUMBER, and some numbers should appear.  this is the ciphertext, and what you should put in your proposal (after SHHHH)

to decrypt, you take the ciphertext, paste it into the second box from the bottom, and click CONVERT TO TEXT.  if you follow these instructions, you should get a legible message.

here’s a lil test string:

40632347383275722345423254470776778329354

Second method (later):

To encrypt, do the following:

Step 1. Go to http://islab.oregonstate.edu/koc/ece575/02Project/Mor/ and enter n=1769118319, e=241, d=1137748041 and the key phrase into the box labelled “Plain text message”, click “Convert to Number” then “Encrypt” buttons.  Copy numbers in last text box as the first paragraph of the proposal.

Step 2. Go to http://sharkysoft.com/misc/vigenere/ and enter the text of the proposal and the key that was encrypted in step 1 and click “Encrypt”.

To decrypt, do the following:

Step 1. Go to http://islab.oregonstate.edu/koc/ece575/02Project/Mor/ and enter n=1769118319, e=241, d=1137748041.  Enter the first paragraph in the text box labelled “Encoded numerical message”, click “Decrypt” then “Convert to Text” buttons.  This is the key for the Vignere cipher.

Step 2. Go to http://sharkysoft.com/misc/vigenere/ and enter the text of the proposal after the first paragraph and the decrypted key and click “Decrypt”.

Sample text:

75368772748538025889872472297570470030195091122303854993857618835422922406872942653957606733301976443

Axs, jrs rce my oxegb.  C xriz rcn yuv bf mv rcf djz umssu.

That’s great info, thanks!

Yeah, those were great times (but only for those in GNO). I’d imagine it’s not much fun to try to figure out what was going on….

Actually, I believe the original encryption was to interpret the ASCII as a base-128 number and convert it to base-10. (This is the what the ‘Covert to Number’ button does on that applet regardless of any of the other fields.)

I was in GNO and I STILL have no idea what was going on.

Rodney: You weren’t part of the Inner Circle of GNO (Yoda, Qwaz, me, and… wait for it… Bucky! He actually helped scam to make me win. Strange, I know.)

Nice work taking the time to chase this up, by the way, Ais.