What is Public key infrastructure?
In short
A public key infrastructure (PKI) is the system of certificate authorities, digital certificates and policies that links public keys to verified identities, so people can trust whose key they are using.
Key takeaways
- It underpins secure web connections and digital signatures.
- A certificate authority signs certificates; compromised or expired certificates are revoked or rejected.
- Private keys must be kept secret by their owners.
Where it's tested
ISC: Information Security Fundamentals — study notes, a five-minute revision sheet and practice questions.
Practise: 3 questions
Question 1 of 3 · 0 answered
A sender adds a digital signature to a contract. Which key does the sender use to create the signature, and which does the recipient use to verify it?