Abstract
A non-interactive certificate update protocol (NICU) allows a certification authority (CA) to update the public key of node certificates without interacting with nodes and with the new certificate, a node can update its private signing key accordingly. In this paper, we provide constructions of efficient NICU protocols and instantiate them based on pseudo random functions, encryption schemes and the homomorphism of the signature key pairs. We thoroughly evaluate the NICU protocols and exhibit their outstanding efficiency in terms of speed of certificate update and bandwidth consumption. In addition, we provide a formal security model of NICU, which can be of independent interest, and prove that our protocols are secure.
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