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Mandatory Bundle Agent Security Services for Protecting the DTN Infrastructure Access Control— to ensure that only legitimate applications with appropriate authority and permissions are allowed to inject bundles into the network Hop-by-hop sender authentication— to verify the identity of the previous-hop bundle agent that claims to have sent a bundle Hop-by-hop bundle header integrity— to detect bundles that have had their headers modified since being sent from the previous-hop router, and Limited protection against denial of service— to ensure that some types of illegitimate traffic on the DTN are detected as soon as possible and dropped immediately upon detection, e.g. Bundles from legitimate applications but not at an authorized CoS Bundles from illegitimate bundle agents Legitimate bundles that have had their headers modified |