[Introduction] [Why ?] [IPsec] [SSL] [Apache / SSL] [SSH]

Why to we need to encrypt network traffic ?

Exchanges are encrypted to deny illegal spying on information in the flow

Three needs are resolved, thanks to encryption:

Authentication need

Confidentiality need

Integrity need

Different protocols are in use today to encrypt and authenticate traffic:

IPsec (Internet Protocol Security)

SSL (Secure Socket Layer)

SSH (Secure Shell)

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