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Paper 2003/221
A Cryptanalysis of the Original Domingo-Ferrer's Algebraic Privacy Homomophism
Jung Hee Cheon and Hyun Soo Nam
Abstract
We propose a cryptanalysis of the original Domingo-Ferrer's algebraic privacy homomorphism. We show that the scheme over $\Z_n$ can be broken by $d+1$ known plaintexts in $O(d^3\log^2 n)$ time when it has $d$ times expansion through the encryption. Furthermore even when the public modulus $n$ is kept secret, it can be broken by $d+2$ known plaintexts in time at most $O(d^5\log^2(dn))$.
Metadata
- Available format(s)
- PDF PS
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Privacy homomorphismEncrypted DataDatabase Security
- Contact author(s)
- hsnam @ math snu ac kr
- History
- 2003-10-13: revised
- 2003-10-12: received
- See all versions
- Short URL
- https://ia.cr/2003/221
- License
-
CC BY