Hack the Route Start free Open app Encryption and trust
Self-signed certificate
A certificate whose issuer is its own subject: nobody vouches for it but itself.
Devices make one for their own web pages, since no public CA signs a name like printer.lab. Trusting it means pinning that exact certificate, and is only safe if the first copy is checked, by its SHA-256 fingerprint, against one read outside the network path. A root CA's certificate is self-signed too; what differs is that trust stores carry it.