TLS provides confidentiality, integrity, and authentication on top of TCP. The handshake negotiates cipher suites, exchanges keys (often ECDHE for forward secrecy), and verifies the server certificate chain against trusted roots. TLS 1.3 removes obsolete algorithms and cuts round trips.
TLS 1.2+ full handshake (simplified)
👋
ClientHello
ciphers, key shares
📜
ServerHello + cert
Prove identity
🔑
Key exchange
ECDHE + Finished
🔒
App data
AEAD records
▶
Full content is available with a subscription.
Get full access to all courses on the platform for one year with a single payment.
▼
Unlike other platforms that charge per course, here you get everything for one price, and after one year of use there will be no automatic charge for the following year.