Define the HTTPS protocol and its security features.
Tests knowledge of secure web communication, encryption, and the role of certificates.
Why Interviewers Ask This
Security is paramount in e-commerce. Interviewers verify you understand how data is protected in transit and the cryptographic foundations of HTTPS.
How to Answer This Question
Define HTTPS as HTTP over SSL/TLS. Explain the handshake process involving symmetric and asymmetric encryption. Mention the role of digital certificates and Certificate Authorities. Highlight protection against man-in-the-middle attacks and data tampering.
Key Points to Cover
- SSL/TLS foundation
- Encryption types
- Certificate validation
- Data integrity
Sample Answer
HTTPS encrypts data transmitted between a client and server using SSL/TLS protocols. It begins with a handshake where asymmetric encryption exchanges keys, followed by symmetric encryption for the session. Digital certificates verify server identity, ensuring users connect to the legitimate site and protecting sensitive data like credit card numbers from interception.
Common Mistakes to Avoid
- Confusing HTTP with HTTPS
- Ignoring the certificate authority role
- Failing to mention port differences
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