Content 🧃Goals Of Cryptography🧃OpenSSL Introduction🧃Symmetric Key Cryptography🧃Message Digest🧃MAC and HMAC🧃Asymmetric Encryption And Decryption🧃Digital Signatures And Verification🧃X.509 Certificate And PKI🧃Establish TLS Connection And Sending Data🧃Using X.509 Certificate in TLS🧃Running A Mini CA