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Space-efficient, byte-wise incremental and perfectly private encryptio

Incremental cryptography Perfect privacy Parallel cryptography Secure cloud storage

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#1 Sp1nsp3n



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Posted 07 March 2014 - 03:16 AM

The problem raised by incremental encryption is the overhead due to the larger storage space required
by the provision of random blocks together with the ciphered versions of a given document. Besides,
permitting variable-length modifications on the ciphertext leads to privacy preservation issues. In this paper
we present incremental encryption schemes which are space-efficient, byte-wise incremental and which
preserve perfect privacy in the sense that they hide the fact that an update operation has been performed
on a ciphered document. For each scheme, the run time of updates performed turns out to be very efficient
and we discuss the statistically adjustable trade-off between computational cost and storage space required
by the produced ciphertexts.

Full white paper with examples and refferences:


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