I'm trying to encrypt a message with RSA. I'd like to do this as part of a game/scavenger hunt I'm organizing for the holidays. I understand how RSA encryption works but I'm having trouble finding a way to encrypt and decrypt the message.
I found this site to help with encryption/decryption:
https://www.cs.drexel.edu/~introcs/Fa11/notes/10.1_Cryptography/RSA_Express_EncryptDecrypt.html
but I can't seem to come up with any keys that make it easy to go back and forth for encryption/decryption of this message:
11-14-23-6 1-11 19 5-7-7-11-23
How can I come up with relatively simply keys to use? I know the purpose of RSA is to be difficult to crack but in this case it doesn't matter, I just don't want super long keys.
e = 5
d = 269
N = 493
r = 448
e*d = 1345
e*d mod r = 1
e and N are relatively prime, d and N are relatively prime, e and r are relatively prime, d and r are relatively prime.
https://www.cs.drexel.edu/~introcs/Fa11/notes/10.1_Cryptography/RSAWorksheetv4d.html