omarabdelfattah / RSA-3des

server and client shares messages using RSA and 3des

Client-server app, key sharing using RSA and messages by 3des

• N, p,and q predefined.
• Server shares “e”→public key.
• Client receives“e”to useitin decryption.
• Server sends 3 messages encrypted by RSA to the client:
  • K1
  • K2
  • K3
• The client decrypts these 3 messages using the extended euclidean algorithm.
• Server sends a message “M” encrypted in 3des to the client:
  • E(D(E(M,K1),K2),K3)
• The client decrypts the received message “M” using
  • D(E(D(M,K3),K2),K1)
• Print the decrypted message.

Connection

Server and client is connected using server socket on port 9090

How to use ?

1- Allow concurrent run for both server and client.
2- Run Server first.
3- Run client.