1. York Extra in departments

2. Background Web-based announcement system Publishing tool channels, scheduling,targeting http://www.york.ac.uk/systems/yorkextra/admin/ Viewing tool channel selection, viewing options only see targeted messages http://www.york.ac.uk/systems/yorkextra/

3. Background Publishing –channels defined by the Communications Office names, selection options (opt in/opt out/mandatory) –publishers register with the Communications Office Viewing –At login on Computing Service systems via a small headline viewer

4. Problems The York Extra viewer needs to know who's using it Must be a Computing Service account Not all departments use the Computing Service name space Double-authentication Hijacking the user's desktop

5. Message server Client Info Server York Extra Web server jcb1 cserv-managed

6. Message server Client Info Server York Extra Web server jcb1 cserv-managed messages please

7. Message server Client Info Server York Extra Web server jcb1 cserv-managed who is it?

8. Message server Client Info Server York Extra Web server jcb1 cserv-managed who are you?

9. Message server Client Info Server York Extra Web server jcb1 cserv-managed jcb1 CISender

10. Message server Client Info Server York Extra Web server jcb1 cserv-managed jcb1

11. Message server Client Info Server York Extra Web server jcb1 cserv-managed jcb1's messages

12. Message server Client Info Server York Extra Web server jcb1 cserv-managed jcb1's messages

13. Message server Client Info Server York Extra Web server jcbyrne dept-managed

14. Message server Client Info Server York Extra Web server messages please jcbyrne dept-managed

15. Message server Client Info Server York Extra Web server who is it? jcbyrne dept-managed

16. Message server Client Info Server York Extra Web server who are you? jcbyrne dept-managed

17. Message server Client Info Server York Extra Web server don't know jcbyrne dept-managed

18. Message server Client Info Server York Extra Web server jcbyrne dept-managed authenticate user

19. Message server Client Info Server York Extra Web server jcbyrne dept-managed jcb1

20. Message server Client Info Server York Extra Web server jcbyrne dept-managed jcb1's messages

21. Message server Client Info Server York Extra Web server jcbyrne dept-managed jcb1's messages

22. Message server Client Info Server York Extra Web server jcbyrne dept-managed

23. Message server Client Info Server York Extra Web server messages please jcbyrne dept-managed

24. Message server Client Info Server York Extra Web server who is it? jcbyrne dept-managed

25. Message server Client Info Server York Extra Web server who are you? jcbyrne dept-managed

26. Message server Client Info Server York Extra Web server jcbyrne dept-managed CISender

27. Message server Client Info Server York Extra Web server jcbyrne dept-managed jcbyrnejcb1 fbloggsfb27 … …… … jcbyrne

28. Message server Client Info Server York Extra Web server jcbyrne dept-managed jcb1 jcbyrnejcb1 fbloggsfb27 … …… … jcbyrne

29. Message server Client Info Server York Extra Web server jcbyrne dept-managed jcb1's messages

30. Message server Client Info Server York Extra Web server jcbyrne dept-managed jcb1's messages

31. Steps Install Java runtime environment on client system –JRE 1.4 or higher –available from http://java.sun.com Install CISender on client system –available from Computing Service Configure CISender to run at startup

32. Steps DCO –register client systems –http://www.york.ac.uk/systems/yorkextra/networks/ User –register username –http://www.york.ac.uk/systems/yorkextra/register/

33. YE Previewer The hijack problem Replaces York Extra viewer at login time Displays user's message headlines Provides link to York Extra Viewer Note: The previewer is not a web browser

34. Message server Client Info Server York Extra Web serverYEPreviewer jcbyrne dept-managed

35. Message server Client Info Server York Extra Web server jcbyrne dept-managed I'm jcbyrne who am I? YEPreviewer

36. Message server Client Info Server York Extra Web server jcbyrne dept-managed YEPreviewerjcbyrnejcb1 fbloggsfb27 … …… … I'm jcbyrne who am I?

37. Message server Client Info Server York Extra Web server jcbyrne dept-managed YEPreviewerjcbyrnejcb1 fbloggsfb27 … …… … jcb1

38. Message server Client Info Server York Extra Web server jcbyrne dept-managed YEPreviewer jcb1's headlines

39. Steps Install Java runtime environment on client system –JRE 1.4 or higher –available from http://java.sun.com Install YEPreviewer on client system –available from Computing Service Configure to run at startup Configure to run user's browser

40. Issues CISender –currently uses port 1235 (flexibility planned) –will only communicate with authorized servers Client system registration –a client system can only belong to one cluster –client usernames must be unique within a cluster

41. Availability Soon