Information security is a part of the core of computer field. This existing PKI system can not satisfy themore and more demand from people. Simple Public Key Infrastructure, SPKI, is new standard of public key certifi-cate, which can bring a simple but precise naming and authorization system for distributed computing environment.The base theory of SPKI is presented, and the brief analysis about its study hotspots and shortcomings are also shownin the paper.
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