I’m having the same issue installing zcash on Ubuntu server 14.04.5 LTS.
I tried installing/reinstalling apt-transport-https, and I get the following message:
apt-transport-https is already the newest version.
So I assume it’s ok.
When doing apt-get update, I get:
Err https://apt.z.cash jessie/main i386 Packages
gnutls_handshake() failed: Handshake failed
Also tried using gnutls-cli to get more info, this is result:
fab@smv:~$ gnutls-cli -V -p 443 apt.z.cash
Connecting to ‘22.214.171.124:443’…
*** Fatal error: A TLS fatal alert has been received.
*** Received alert : Handshake failed
*** Handshake has failed
GnuTLS error: A TLS fatal alert has been received.
Any additional idea on how to solve this?