1. An apparatus comprising: a peripheral circuit, included in a system-on-a-chip, that includes: an interface control circuit configured to receive an electronic message including a cryptographic keyword and a policy value, wherein the policy value includes one or more data bits indicative of one or more policies that define allowable usage of the cryptographic keyword; and a security circuit configured to: extract the cryptographic keyword and the policy value from the electronic message; perform an authentication of the electronic message to determine if the electronic message is valid; apply at least one policy of the one or more policies to usage of the cryptographic keyword in response to a determination that the authentication of the electronic message succeeded; and delete the cryptographic keyword in response to a determination that the authentication of the electronic message failed.