Abstract
Protect data in the cloud is becoming more and more important. Cryptographic keys are used to encrypt the data, so the key management is the paramount issue to persuade the website owners to save their data in the cloud. In this paper, we discuss the KMS (key management service) in cloud. We focus on security of key protection. Besides, we also analyze the scalability and performance of it. We do the research about three typical key management services which are popular now. They are AWS CloudHSM, Keyless SSL and STYX. This paper discusses the key management architecture scheme of these three typical cloud service modes, and proposes the architecture and function of the key management application system from the aspects of the key management service security and scalability requirements.
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