1. A method for execution by a device seeking registration with a storage network, the method comprises: outputting a registration request message that includes requesting access to a local dispersed storage network (DSN) and requesting access to a global DSN, wherein the global DSN includes a plurality of DSNs and the local DSN is one of the plurality of DSNs; receiving a registration response message that includes a global universal unique identifier (UUID) and a local UUID; generating a global public-private key pair and a local public-private key pair; generating a global certificate signing request (CSR) based on the global UUID and a private key of the global public-private key pair; generating a local CSR based on the local UUID and a private key of the local public-private key pair; sending the global and local CSRs to a certificate authority (CA); wherein the local CSR includes: a local authorization code, the local UUID and a local public key of the local public-private key pair; wherein the global CSR includes: a global authorization code, the global UUID and a global public key of the local public-private key pair; and receiving a signed global certificate and a signed local certificate, wherein the signed global certificate indicates that the device is authorized to access the plurality of DSNs and the signed local certificate indicates that the device is authorized to access the local DSN.