Public Key Infrastructure (PKI) Jerad Bates University of Maryland, Baltimore County

Overview Introduction Introduction Background Background Certificates Certificates Organization Organization Conclusions Conclusions

Introduction Motivation Motivation What is a PKI? What is a PKI?

Background Cryptographic tools Cryptographic tools Putting them together Putting them together A secure communication session A secure communication session

Certificates What they are What they are How they are issued How they are issued How they are distributed How they are distributed

Organization What is “Trust”? What is “Trust”? How do we organize a PKI to disseminate trust How do we organize a PKI to disseminate trust Models Models Hierarchy Hierarchy Networked Networked Web Browser Web Browser PGP PGP

Conclusions What a PKI can do What a PKI can do What a PKI can not do What a PKI can not do Issues and Limitations Issues and Limitations

Sources Stinson, Douglas R. Cryptography: Theory and Practice. 3rd ed. Boca Raton, FL: Chapman & Hall/CRC, Stinson, Douglas R. Cryptography: Theory and Practice. 3rd ed. Boca Raton, FL: Chapman & Hall/CRC, Tanenbaum, Andrew S., and Maarten V. Steen. Distributed Systems: Principles and Paradigms. 2nd ed. Upper Saddle River, NJ: Pearson Prentice Hall, Tanenbaum, Andrew S., and Maarten V. Steen. Distributed Systems: Principles and Paradigms. 2nd ed. Upper Saddle River, NJ: Pearson Prentice Hall, 2007.