Proof of Possession for Cloud Storage via Lagrangian Interpolation Techniques
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- Krzywiecki Ł., Kutyłowski M. (2012) Proof of Possession for Cloud Storage via Lagrangian Interpolation Techniques. In: Xu L., Bertino E., Mu Y. (eds) Network and System Security. NSS 2012. Lecture Notes in Computer Science, vol 7645. Springer, Berlin, Heidelberg
We consider Provable Data Possesion (PDP) - a protocol which enables an owner of data stored in the cloud to verify whether this data is still available in the cloud without holding a copy of the file. We propose a PDP framework based on Lagrangian interpolation in the exponent for groups with hard discrete logarithm problem. We reuse properties of this arithmetic exploited so far in broadcast encryption systems.
Keywordsprovable data possession proof of retrievability cloud computing Lagrangian interpolation in the exponent broadcast encryption
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