If you want to dig deeper into the theory, there are several good books (the first two are more on the theoretical path, the next four are more on the applied path):
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to do the transfer.Īnother possibility is using the free and open-source e-learning tools (CT2, JCT, or CTO) from the CrypTool project ( and do your own experiences or add your own implementations there.įor CT2 there is also a YouTube channel 'Cryptography for Everybody' ( You might want to practice in parallel and gain a deeper understanding this way by trying the productive tool OpenSSL – see. If you need it as a decimal integer you could use Python or bc e.g. $openssl s_client -connect :443 | openssl x509 -pubkey -noout > public.key You can use any hostname there which serves secure http sites.
Here his advice applied to using openssl.