A trusted server receives a request for an activation code, which includes an identifier associated with the trusted server and a one-time password, for a client device. The trusted server obtains the identifier from a public server, generates the one-time password, and combines the one-time password with the identifier to create the activation code. The trusted server provides the activation code to a provisioning client, which presents the activation code to the client device. The trusted server and client device secure a communication session using the one-time password as a shared secret. The trusted server downloads trusted cryptographic information to the client device over the secure communication session.