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SSL/TLS are the protocols that aim to provide privacy and data integrity between two parties.
HTTPS is HTTP protocols over SSL or TLS protocols. It requires the SSL/TLS establish first, then HTTP is exchanged over SSL/TLS protocols.
In TLS, Certificate contains the public key that server sends out. Publish key will be used to encrypt the symmetric key later.
In the end, client and server communicates through the symmetric key.
