ElGamal_begin

Generate private and public key as files and use them for encrypt and decrypt with crypto++.

create private key file

gcc -Wall privCreateAndSave.cpp -o create_priv -lcryptopp -lstdc++
./create_priv

This take a while!

create public key file

gcc -Wall privReadAndSavePub.cpp -o create_pub -lcryptopp -lstdc++
./create_pub

This reads the priv.der private key file and generates a public key file.

read public key to encode argv

gcc -Wall main.cpp -o use_me -lcryptopp -lstdc++
./use_me "Hallo Bob."

File main.cpp also read private key to decode the result.

your turn

use this base code to make base64 stuff and tcpsockets as a point-to-point encryption(?)