SSL Complete Guide 2021: HTTP to HTTPS - Exploring Certificate of Comodo

The lecture explores the analysis of certificates, focusing on Comodo's certificate used for data encryption. It highlights differences between domain and extended validation certificates, detailing the certificate chain, issuer information, and validity. The lecture also discusses how web browsers handle these certificates and raises questions about trust and chain of trust in certification authorities.

What is the primary purpose of a certificate used for encryption?

• To provide a lock icon on the browser

• To encrypt data between the user and the website

• To display the company's name

• To sell products online

What is the role of the root certification authority in a certificate chain?

• To manage website content

• To provide encryption algorithms

• To act as the top-level certifier in the chain

• To issue domain certificates directly

How long is the validity period of the discussed domain certificate?

• One year

• Two years

• Three years

• Five years

What additional information is included in a certificate with extended validation?

• The company's address and business category

• The user's personal data

• Only the domain name

• The website's content

How do web browsers handle certificates with extended validation differently?

• They redirect to a secure page

• They block the website

• They disable encryption

• They show additional information in the address bar

What is a potential question regarding the trust of root certification authorities?

• How do they manage website content?

• How do they encrypt data?

• How do they sell certificates?

• How do web browsers trust them?

In what scenario might a web browser indicate that a certificate is not valid?

• When the website is secure

• When the certificate is issued by a known authority

• When the website is popular

• When the certificate is expired