Seems to me by the very nature of an encrpted URL that they would never be indexed. However I was wondering if they could be indexed as I have a client (potential) who encrypts everything but the homepage. I did a domain check and there were 4 pages out of 1000's that were indexed, but they sure wouldn't rank high.
It was one of those https://machinename.domain.com/cgi-bin/script.pl Then when you click on it you get this in your browser bar zzSFWEWhjtfuFJDHCrutyADFGSDFGsdfgsdfg
I've managed to convince them to drop the encryption for search engine positioning purposes. Don't know why they had all these pages encrypted in the first place as there isn't any sensitive data there.