The author of this applet can now run it using the appletviewer that comes with JDK 1.1.x, e.g., by typing the Unix/MS-DOS command:

appletviewer http://www.dur.ac.uk/~dcl0bjc/Java/Signed/Ages/AgesLet.html

If another user wants to execute the above appletviewer command perhaps somewhere else in the world, then first they will have to have a copy of your x509 certificate file (that is in the file Barry.x509) and then they will have to execute the Unix/MS-DOS command:

javakey -c "Barry" true

to introduce Barry as an identity and then execute:

javakey -ic "Barry" Barry.x509

to add Barry's certificate to their identitydb.obj file. Having done that, appletviewer will execute any applet that have been signed by Barry.