Definition

A Certificate Authority (CA) is an entity responsible for issuing and managing digital certificates that verify the authenticity and identity of websites, individuals, and organizations in online communications.

Used Cases

• Used in Secure Socket Layer (SSL) and Transport Layer Security (TLS) protocols to authenticate websites and establish secure communications.• Employed by organizations to verify digital signatures in email communications and document signing.

FAQs

What is the role of a Certificate Authority (CA) in web security?

CAs issue digital certificates that authenticate the identity of websites, ensuring that users can trust the site they are communicating with.

How does a CA verify the identity of a website or organization?

CAs use various validation methods, including domain ownership verification and organizational vetting, before issuing a certificate.

What happens if a CA is compromised?

If a CA is compromised, attackers could issue fraudulent certificates, leading to man-in-the-middle attacks or other security breaches.

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