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Paper 2014/113

Secure Compression: Theory \& Practice

James Kelley and Roberto Tamassia

Abstract

Encryption and compression are frequently used together in both network and storage systems, for example in TLS. Despite often being used together, there has not been a formal framework for analyzing these combined systems; moreover, the systems are usually just a simple chaining of compression followed by encryption. In this work, we present the first formal framework for proving security in combined compression-encryption schemes and relate it to the traditional notion of semantic security. We call this entropy-restricted semantic security. Additionally, we present a new, efficient cipher, called the squeeze cipher, that combines compression and encryption into a single primitive and provably achieves our entropy-restricted security.

Note: Revision: Added email addresses of the authors. Added two small lemmas that were omitted in the security proof. Small edits in the text to improve readability and formatting.

Metadata
Available format(s)
PDF
Category
Secret-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
CompressionEncryptionSecure compressionEntropyProvable security
Contact author(s)
jakelley @ cs brown edu
History
2014-03-25: last of 2 revisions
2014-02-16: received
See all versions
Short URL
https://ia.cr/2014/113
License
Creative Commons Attribution
CC BY
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