Key Management Server Design for Providing Cryptographic Service in Cloud Computing Environment (Services in a Cloud Environment)

  • Jung, Ki Hyun ;
  • Shin, Seung Jung
  • Received : 2016.09.25
  • Accepted : 2016.10.25
  • Published : 2016.12.31


In a cloud computing environment, a cryptographic service allows an information owner to encrypt the information and send it to a cloud server as well as to receive and decode encrypted data from the server which guarantees the confidentiality of shared information. However, if an attacker gains a coded data and has access to an encryption key via cloud server, then the server will be unable to prevent data leaks by a cloud service provider. In this paper, we proposed a key management server which does not allow an attacker to access to a coded key of the owners and prevents data leaks by a cloud service provider. A key management server provides a service where a server receives a coded public key of an information user from an owner and delivers a coded key to a user. Using a key management server proposed in this paper, we validated that the server can secure the confidentiality of an encryption key of data owners and efficiently distribute keys to data users.


Cloud;Cryptographic service;Access control;Key management;Public key encryption


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