How do I securely check the downloads?

Hi,

I've noticed that you host downloads over http.
This in itself isn't a problem, except I'm not in a position where I can 
trust my networks not to spoof http sites.

I'd like to verify that the download I get is correct using a secure source.
I believe the simplest way is https.

Do you have an https hosted link to gpg keys or sha2/3 sums that can be 
used to verify the download?

Regards
Mark