  A core feature of Content-Centric Networking (CCN) is opportunistic content
caching in routers. It enables routers to satisfy content requests with
in-network cached copies, thereby reducing bandwidth utilization, decreasing
congestion, and improving overall content retrieval latency.
  One major drawback of in-network caching is that content producers have no
knowledge about where their content is stored. This is problematic if a
producer wishes to delete its content. In this paper, we show how to address
this problem with a protocol called BEAD (Best-Effort Autonomous Deletion).
BEAD achieves content deletion via small and secure packets that resemble
current CCN messages. We discuss several methods of routing BEAD messages from
producers to caching routers with varying levels of network overhead and
efficacy. We assess BEAD performance via simulations and provide a detailed
analysis of its properties.
