1. The Email Success Failure INBOX Accountability Panel San Jose, CA – 2004 Dave Crocker Brandenburg InternetWorking INBOX Accountability Panel San Jose, CA – 2004 Dave Crocker Brandenburg InternetWorking

2. 2 2 D. CrockerINBOX / Authentication – SJ,2004user@host Evolution of the Global Service Originator User Agent Mail Transfer Agent Originator User Agent Originator User Agent Mail Transfer Agent Receiver User Agent Receiver User Agent Receiver User Agent Mail Transfer Agent Mail Transfer Agent Mail Transfer Agent Mail Transfer Agent Mail Transfer Agent Basic Format Attachments.domain Signing & Sealing

3. 3 3 D. CrockerINBOX / Authentication – SJ,2004 Setting the Context 1975 (!) © 1975 (!)Datamation This? Oh, this is the display for my electronic junk mail.

4. 4 4 D. CrockerINBOX / Authentication – SJ,2004 Diversity is Good! Yes?  Complex uses  Office, Home, Kiosk, Laptop, Greeting Card Service  Threats  Small town vs. Big city  More users  More bad people  Spammers  Accountable – easy  Rogue – difficult Political Legal Social Human Administration Technical Management Deployment Many Facets of Email

5. 5 5 D. CrockerINBOX / Authentication – SJ,2004 Other Global Services  How do email proposals compare with authentication done for…  Telephone?  Postal?  Highways?  If we are doing something completely new to a global service  Perhaps we should do it a bit cautiously?  How do email proposals compare with authentication done for…  Telephone?  Postal?  Highways?  If we are doing something completely new to a global service  Perhaps we should do it a bit cautiously?