1. A method comprises: transmitting, by a requesting device, a certificate signing request to a managing unit, wherein the certificate signing request includes fixed certificate information and suggested certificate information; forwarding, by the managing unit, the certificate signing request to a certificate authority; receiving, by the managing unit, a signed certificate from the certificate authority, wherein the signed certificate includes a certificate and a certification signature and wherein the certificate includes the fixed certificate information and determined certificate information based on the suggested certificate information; interpreting, by the managing unit, the fixed certificate information of the signed certificate to identify the requesting device; and forwarding, by the managing unit, the signed certificate to the identified requesting device.