Design of Enclosing Signing Keys by All Issuers in Distributed Public Key Certificate-Issuing Infrastructure

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Abstract
This paper first takes IoT as an example to provide the motivation for eliminating the single point of trust (SPOT) in a CA-based private PKI. It then describes a distributed public key certificate-issuing infrastructure that eliminates the SPOT and its limitation derived from generating signing keys. Finally, it proposes a method to address its limitation by all certificate issuers.