Encryption and trust
Trust store
The list of root certificates a device trusts; every certificate it accepts chains to one of them.
Operating systems ship a vetted list (Mozilla's, on Linux) and organisations add their own roots, on Alpine in
/usr/local/share/ca-certificates. update-ca-certificates builds the bundle programs read,
/etc/ssl/certs/ca-certificates.crt. A root in the store vouches for every certificate it signs, for any name,
so adding one is a decision with weight: an intercepting proxy works exactly by getting its root added.