RFE 4500302 actually requests several enhancements in various places: JDK, jarsigner, PlugIn and Web Start. There is another rfe (4523234) tracking
work needed in JDK to support timestamped signatures.
We plan to implement rfe 4523234 for Tiger (pending Tiger team approval, etc.).
Once rfe 4523234 is done, PlugIn should consider time-of-signing when verifying signed jar.
So I'm filing this rfe to track the work needed in PlugIn (if any). I'll file another rfe to track work needed in Web Start (if any). RFE 4500302 will be used to track enhancements needed in jarsigner. I'll add notes in rfe 4500302.