There is disclosed a method of establishing trust between an agent device and a verification apparatus, the method comprising: obtaining, at the agent device, a trust credential, wherein the trust credential relates to an aspect of the agent device and comprises authentication information for identifying at least one party trusted by the verification apparatus and/or device data relating to the agent device; transmitting, from the agent device to the verification apparatus, the trust credential; obtaining, at the verification apparatus, the trust credential; analysing, at the verification apparatus, the trust credential; determining, at the verification apparatus, whether the agent device is trusted based on the analysis; and responsive to determining the agent device is trusted, establishing trust between the agent device and the verification apparatus.