http://riseup2a3go3phwiacrkq35qj2mjuankua4oxbu3b6nwil77soa5k6qd.onion/en/security/network-security/riseup-ca
Verify the Riseup CA certificate (optional) This verification process is not required in order to use the Riseup CA certificate. However, without verification, you cannot be certain you have downloaded the correct certificate, and you cannot be certain that your connections are secure. Be warned: this verification process is difficult, requires an understanding of OpenPGP, and ultimately depends on trusting someone you already know who has certified...