I want to know what is the securitypack.jar in Java installation? What is it for?
I found that Java downloads this file automatically from: https://javadl-esd-secure.oracle.com/update/securitypack.jar and saves inside:
C:\Users\username\AppData\LocalLow\Sun\Java\Deployment\security\securitypack.jar
FIY: I'm using Windows 7 and latest Java 8 (u144). And in my case, this file was updated during Java Applet execution (or maybe initialization).
That's part of Oracle's blacklist jar feature. The information about blacklisted jars and certificates is automatically updated by downloading securitypack.jar file