Applet throws java.security AccessControlException in java console when playing it

Testsuite:set1 in applet
Test name(s):byart_Sudoku
Product(s) tested:Jre8u45b04 32bit
OS/architecture:windows7 sp1 x86
Reproducible: Always
Reproducible on machine: egtc

Is it a Regression:Yes

[If Regression] Regression introduced in release/build: Jre8u45b02
(Jre 8u45b01 32bit+Windows7 sp1 x86+IE11:Pass)
(Jre 8u45b02 32bit+Windows7 sp1 x86+IE11:Failed, it's the same issue)

Test result on the last GAed release for this train: Pass
(Jre 8u31b13 32bit+Windows7 sp1 x86+IE11:Pass)

[if Fail] Test result on FCS:
(Jre 8b132 32bit+Windows7 sp1 x86+IE11:Pass)

Is it a platform specific issue:No
(Jre 8u45b04 32bit+Mac10.9+Safari7: Failed,it is the same issue)
(Jre 8u45b04 32bit+Oel6.4 x86+FF36: Failed,it is the same issue)

Exception/Error from Log:http://scaaa008.us.oracle.com:9502/runs%2F706004.ManualSubmit-1/workDir/set1/byart_Sudoku.jtr

Copy applet workspace,install test jre,and run this case
Steps to reproduce:
1. Add "http://www.by-art.com/" to ESL (Exception Site List).
2. Browse http://www.by-art.com.
3. Select to play "Sudoku" game.
4. Review "How to play Sudoku" if needed.
5. Click "Run" in the applet.

The actual result:
Step 4: applet throws java.security AccessControlException in java console when playing it, please refer to byart_Sudoku.html.jpg and byart_Sudoku.html.txt.