This Applet should raise a SecurityException, unless granted permission to create files in the C:\Temp directory.
Download Wayne Pollock's certificate. (Right-click on this link, and choose "Save link as...".) You need to add this to your keystore in order to grant Applets signed by WaynePollock extra permissions. To verify you really have Wayne Pollock's certificate, and not some impostor's certificate, you should check the certificate's fingerprint. It should match the following:
Owner: CN=Wayne Pollock, OU=Computer Science Dept, O=HCC, L=Tampa, ST=Florida, C=US Issuer: CN=Wayne Pollock, OU=Computer Science Dept, O=HCC, L=Tampa, ST=Florida, C=US Serial number: 38d7ee4c Valid from: Tue Mar 21 16:49:00 EST 2000 until: Mon Jun 19 17:49:00 EDT 2000 Certificate fingerprints: MD5: B4:57:DA:B6:47:29:F1:CB:6C:FB:30:E0:ED:9C:41:25 SHA1: 15:AA:F3:1F:AE:5B:98:91:9A:EC:58:17:28:45:06:C4:17:2B:60:EB
(You should really use SSL connection to verify a fingerprint, since an imposter could post his or her certificate's fingerprint on an unsecure web page!)