cloud storage security - tech conf 2014

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Stockage Cloud: Confidentialité, Encryption et Deduplication Deduplication PUZIO Pasquale Doctorant CIFRE SecludIT & EURECOM

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Page 1: Cloud storage security - Tech conf 2014

Stockage Cloud:

Confidentialité, Encryption et

Deduplication Deduplication

PUZIO Pasquale

Doctorant CIFRE

SecludIT & EURECOM

Page 2: Cloud storage security - Tech conf 2014

Stockage Cloud

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Confidentialité• Premier menace selon le rapport du CSA (Cloud Security Alliance)

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Encryption

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Encryption

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Deduplication

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Page 9: Cloud storage security - Tech conf 2014

Deduplication

...mais ça ne marche pas avec les données chiffrées!

D = Hello World

D = Hello World

ENCRYPTION with K1 ENCRYPTION with K2

owhfgr0wgr[whfrw0[h0[erghe0[gh0[eg

dfjl;dbfrwbfirbfroepthwobgfrugtwertgrtwu

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Page 10: Cloud storage security - Tech conf 2014

Convergent Encryption

K = hash(Data)

D = Hello World

D = Hello World

ENCRYPTION with H(D) ENCRYPTION with H(D)

klfgwilegfiorwegtriegtiergieiergriegrigfifiw

klfgwilegfiorwegtriegtiergieiergriegrigfifiw

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Page 11: Cloud storage security - Tech conf 2014

Deduplication + Convergent

Encryption

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Page 12: Cloud storage security - Tech conf 2014

Risques pour la Confidentialité

• Offline brute-force attack

• Confirmation of a file

• Learn the remaining information

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Page 13: Cloud storage security - Tech conf 2014

Learn the remaining information attack

REMAINING

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REMAINING

INFORMATION

Page 14: Cloud storage security - Tech conf 2014

Solution: ClouDedup

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Page 15: Cloud storage security - Tech conf 2014

MerciMerciQuestions ?

http://elastic-security.com/

http://secludit.com/

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