Comment 5 for bug 1578466

I'm not too sure if we want to enable encryption for all cache data. Encryption is considered to have performance impact and if the data is not quite sensitive then encryption such data would be just redundant.

I don't block this work, but if we don't hear any other use cases where not having the common encryption mechanism causes pain and anyone is actually interested in bringing this functionality for further period, I'd close this as won't fix.