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Public Key Infrastructure

Ben Sangster February 23, 2006. Public Key Infrastructure. Outline. What is Public Key Infrastructure (PKI)? Functions and Components of PKI How does PKI work? Present day use of PKI Future of PKI Questions. What is Public Key Infrastructure? (also known as PKI).

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Public Key Infrastructure

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  1. Ben Sangster February 23, 2006 Public Key Infrastructure

  2. Outline • What is Public Key Infrastructure (PKI)? • Functions and Components of PKI • How does PKI work? • Present day use of PKI • Future of PKI • Questions

  3. What is Public Key Infrastructure?(also known as PKI) • Technology that enables users to securely and privately exchange data over an unsecured medium without the loss of integrity or confidentiality • Also manages how user and network resources are identified and given access to online information and services

  4. Functions and Components of PKI • Certification authority (CA) • Registration authority (RA) • PKI clients • Digital certificates • Certificate Distribution System or repository • Keys (Public and Private)

  5. Functions of PKI (cont.) • Certificate Requests • Certificate Revocation • Client to Client Interaction • Timestamping • Non-repudiation • Cross-certification

  6. How does PKI work? • Entities • Host A, B • RA, CA • Objects • Public Keys for all entities • Private Keys for all entities • Digital Certificate • Hash Function • Message

  7. Examples(Private Key, Certificate, Certificate Request) • Sample Private Key (2048 bits, TXT format) • Sample CA Certificate (TXT format) • Sample Certificate Request (TXT format)

  8. PKI Entities

  9. Example of Certificate Request and Distro Architecture

  10. Present Day Exampleof PKI in Use • U. S. Department of Defense • Canadian Government • Corporate World • Academia

  11. DOD PKI

  12. Future of PKI • Eventually, same distribution of PKI enabling hardware and software as we have seen in the growth of computers in homes and businesses • The emergence and growth of e-commerce gives validity to PKI and its future (but PKI does not give e-commerce validity)

  13. Questions

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