A Legal and Technical Perspective on Secure Cloud Storage
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1 A Legal and Technical Perspective on Secure Cloud Storage Sebastian Graf, Jörg Eisele and Marcel Waldvogel University of Konstanz Marc Strittmatter HTWG Konstanz
2 Cloud Services from a customers point of view
3 Cloud services from a technical point of view
4 Security Goals to achieve Confidentiality Accountability Integrity Availability Assurance
5 Responsibility in the cloud?
6 Point of technical interference Application Cloud Service Service Application Platform Operating System Hardware SaaS Threshold of Technical Control PaaS IaaS Customer Cloud Provider
7 Storage Internal Service Storage User-Centric VS Application-Centric Usage
8 Techniques to establish security Accountability Confidentiality? Integrity Availability Assurance
9 How to guarantee security behind the wall?
10 Legal Aspects Privacy Unauthorized Access Harming Data Author's Rights Contracts
11 Integrity Accountability Legal Aspects 303a StGB 43,2 BDST Availability 202a StGB 202b StGB 106 UrhG 108 UrhG Confidentiality Integrity Checksumming Signatures Accountability Technical Measures Erasure Codes Policies Versioning Availability Caching Encryption Key Mgmt Confidentiality
12 What's next?
13 Thanks for your attention! Questions? Sebastian Graf Distributed Systems Group University of Konstanz
14 Slide 2: Slide 3: Slide 5: Slide 8: Picture from under sxu license from Kroma Kromalski, Poland ( Picture under morguefile Free License from Picture from under Creative Commons from DB Kind, USA ( References to Pictures Slide 9: Picture from Picture under Public Domain from Picture from under Creative Commons from Dave Paker, USA ( Picture from under sxu license Picture from under sxu license Slide 10: Picture under morguefile Free License from Picture under Public Domain from Picture from under Creative Commons from Andy Roberts, UK ( Picture under morguefile Free License from Picture under morguefile Free License from Slide 11: Picture from Slide 12: Picture from under Creative Commons from Jurgen Dabeedin, UK
15 References [BCQ + 11] [BJO09] [Fie00] Alysson Bessani, Miguel Correia, Bruno Quaresma, Fernando André, and Paulo Sousa. DepSky: dependable and secure storage in a cloud-of-clouds. In Proceedings of the sixth conference on Computer systems, EuroSys 11, Kevin D. Bowers, Ari Juels, and Alina Oprea. HAIL: a high-availability and integrity layer for cloud storage. In Proceedings of the 16th ACM conference on Computer and communications security, CCS 09, Roy Thomas Fielding. Architectural styles and the design of network-based software architectures. PhD thesis, University of California, Irvine, Chair-Taylor, Richard N. [Gar07] Simson L. Garfinkel. An Evaluation of Amazons Grid Computing Services: EC2, S3, and SQS. Technical report, Center for, References to Literature [GKW11] Sebastian Graf, Marc Kramis, and Marcel Waldvogel. Treetank: Designing a Versioned XML Storage. In XMLPrague 11, [GMSW06] Dominik Grolimund, Luzius Meisser, Stefan Schmid, and Roger Wattenhofer. Cryptree: A Folder Tree Structure for Cryptographic File Systems. In 25th IEEE Symposium on Reliable Distributed Systems (SRDS), Leeds, United Kingdom, October [Gra11] Sebastian Graf. A secure cloud gateway based upon XML and web services. In PhD Symposium, ECOWS 11, [Lam01] Pradip Lamsal. Understanding Trust and Security, [MG09] [Sch00] [Sto01] Peter Mell and Tim Grance. The NIST definition of cloud computing. National Institute of Standards and Technology, 53(6), Bruce Schneier. Secrets and lies: digital security in a networked world. John Wiley, Gary Stoneburner. Underlaying Technical Models for Information Technology Security. National Institute of Standards and Technology, 2001.
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