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@article{145983,
        author = {MITTA KARTHIK and M. PADMAVATHAMMA},
        title = {Key Management Protocol in Ciphertext Policy },
        journal = {International Journal of Innovative Research in Technology},
        year = {},
        volume = {4},
        number = {11},
        pages = {885-887},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=145983},
        abstract = {Cipher text policy attribute-based encryption(CP-ABE) is a promising cryptographic technique forfine-grained access control of outsourced data in the cloud.However, some drawbacks of key management hinder thepopularity of its application. One drawback in urgent need ofsolution is the key escrow problem. We indicate that front-enddevices of clients like smart phones generally have limited privacyprotection, so if private keys are entirely held by them, clients riskkey exposure that is hardly noticed but inherently existed inprevious research. Furthermore, enormous client decryptionoverhead limits the practical use of ABE. In this work, we proposea collaborative key management protocol in CP-ABE(CKM-CP-ABE). Our construction realizes distributedgeneration, issue and storage of private keys without adding any
extra infrastructure. A fine-grained and immediate attributerevocation is provided for key update. The proposed collaborativemechanism effectively solves not only key escrow problem but alsokey exposure. Meanwhile, it helps markedly reduce clientdecryption overhead. A comparison with other representativeCP-ABE schemes demonstrates that our scheme has somewhatbetter performance in terms of cloud-based outsourced datasharing on mobile devices. Finally, we provide proof of securityfor the proposed protocol
},
        keywords = {},
        month = {},
        }