Establishing a chain of trust in a public key infrastructure can be costly, time consuming and requires nearly constant access to the appropriate network-based authorities. Local trust between devices is established using a combination of a personal identification number (PIN) delivered out-of-band and self-signed certificates. The client may present the PIN to an electronic device such as a projector or printer so the electronic device can trust the client. The electronic device may present a self-signed digital certificate with the electronic device UUID based on a hash of the electronic device public key from the certificate.