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$ curl repovive.com/roadmaps/frontend-system-design-interview-prep/security/secure-communication

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$ curl repovive.com/roadmaps/frontend-system-design-interview-prep/security/secure-communication

Repovive

Secure Communication - Security | Frontend System Design Interview Prep | Repovive

Repovive.

Frontend System Design Interview Prep17 sections · 206 units12h total

Open in Course

Secure Communication

Protecting data in transit

Data between client and server must be encrypted.

HTTPS:

Encrypts all traffic
Prevents man-in-the-middle attacks
Required for modern browser features

HSTS (HTTP Strict Transport Security):

Strict-Transport-Security: max-age=31536000; includeSubDomains

Forces HTTPS. Browser refuses HTTP connections.

Secure cookies:

Set-Cookie: token=abc; Secure; HttpOnly; SameSite=Strict

Secure flag ensures cookie only sent over HTTPS.