juniorWeb Security
What is HTTPS and why is it important for web security?
Updated May 6, 2026
Short answer
HTTPS encrypts communication between client and server using TLS, ensuring confidentiality, integrity, and authentication.
Deep explanation
HTTPS (HyperText Transfer Protocol Secure) uses TLS (Transport Layer Security) to encrypt data in transit. It prevents eavesdropping, tampering, and man-in-the-middle attacks. Certificates issued by trusted CAs verify server identity.
Real-world example
Online banking portals enforce HTTPS to protect user credentials and transactions.
Common mistakes
- Assuming HTTPS alone makes an application fully secure.
Follow-up questions
- What happens during a TLS handshake?
- Can HTTPS be bypassed?