Security Protocols Part 9 SSL Protocol Recap Digital Certificate - - PowerPoint PPT Presentation

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Dec 18, 2023 353 likes •493 views

Security Protocols Part 9 SSL Protocol Recap Digital Certificate Authentication Integrity Non-repudiation CA (Certification Authority) Issue digital certificates (via digital signature) Publish/Distribute digital

SLIDE 1

Security Protocols

Part 9 SSL Protocol

SLIDE 2

Recap

Digital Certificate

– Authentication – Integrity – Non-repudiation

CA (Certification Authority)

– Issue digital certificates (via digital signature) – Publish/Distribute digital certificates, help verify – Revoke digital certificates

Key Exchange Protocol (Diffie-Hellman, 2 primes)

SLIDE 3

Successful SSL = padlock

SLIDE 4

Padlock = layman’s icon for session security*

SLIDE 5

Getting into the details of a server certificate

SLIDE 6

Leaf-CA

SLIDE 7

Intermediate-CA

SLIDE 8

Certificate Details: Cert Extension SAN

SLIDE 9

Certificate Details: Cert Extension CRL, OCSP

SLIDE 10

SLIDE 11

Root-CA

SLIDE 12

Broken padlock = ?

SLIDE 13

Exercise

Write the SSL protocol in the notations we

used to describe earlier protocols

– A digital certificate issued by Sam to Alice is denoted by {A, S, KA, V, E}kS – You may skip notations for “certificate validity – V” and “certificate extension – E” and their implications – Make use of Diffie-Hellman Key Exchange Protocol