| http://www.w3.org/ns/prov#value | - In an exemplary embodiment (e.g., for SMTP), the Policy Management Agent may be employed to make sure that e-mail has been encrypted using certain designated recovery keys; ensure that all e-mail messages are encrypted before allowing them to be delivered; specify whether e-mail must be signed or not before it is allowed to pass the policy requirement; specify whether conventional encryption is al
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