Encryption in Transit

Encryption in transit protects data moving over networks, usually using TLS.

Updated: 2026-03-05

Definition

Encryption in transit protects data while it is transmitted between clients, services, or networks.

TLS is the most common method for encryption in transit on the web (HTTPS).

Key points

Protects data over networks
Most commonly TLS
Prevents many eavesdropping/MITM attacks

Common mistakes

Using self-signed certs in production without trust management.
Leaving legacy plaintext protocols enabled.

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