Https

Three practical topics for operating TLS on top of the basic handshake. Session resumption and 0-RTT cut the repeated cost, mTLS authenticates the client too, and ACME automates certificate issuance and renewal.

TLS builds a secure channel over an untrusted network by providing confidentiality, integrity, and authentication. A walkthrough of symmetric/asymmetric hybrid encryption, the TLS 1.2 handshake, the certificate and PKI trust model, and what TLS 1.3 improved.