Tiziano Bianchi
ABSTRACT
Signal processing tools working directly on encrypted data could provide an efficient solution to application scenarios where sensitive signals must be protected from an untrusted processing device. In this paper, we investigate an issue usually neglected in the proposed solutions for secure processing in the encrypted domain, that is the data expansion from the plaintext to the encrypted representation of signals, due to the use of cryptosystems operating on very large algebraic structures. A packed signal representation is proposed that allows to speed up pointwise operations on encrypted signal via parallel processing and to reduce the size of the whole encrypted signal.
- T. Bianchi, A. Piva, and M. Barni. Implementing the discrete Fourier transform in the encrypted domain. In Proc. of ICASSP 2008, pages 1757--1760, Las Vegas, NV, USA, 2008.Google Scholar
Cross Ref
- Z. Erkin, A. Piva, S. Katzenbeisser, R. L. Lagendijk, J. Shokrollahi, G. Neven, and M. Barni. Protection and retrieval of encrypted multimedia content: When cryptography meets signal processing. EURASIP Journal on Information Security, 2007: Article ID 78943, 20 pages, doi:10.1155/2007/78943, 2007. Google ScholarDigital Library
- P. Paillier. Public-key cryptosystems based on composite degree residuosity classes. In Lecture Notes in Computer Science, volume 1592, pages 223--238. Springer-Verlag, 1999. Google ScholarDigital Library
- J.-R. T. Pastoriza, S. Katzenbeisser, M. Celik, and A. Lemma. A secure multidimensional point inclusion protocol. In ACM Multimedia and Security Workshop - MMSEC'07, pages 109--120. ACM Press New York, NY, USA, 2007. Google ScholarDigital Library
- A. Piva and S. Katzenbeisser. Signal processing in the encrypted domain. EURASIP Journal on Information Security, 2007: Article ID 82790, 1 page, doi:10.1155/2007/82790, 2007. Google ScholarDigital Library
Index Terms
- Efficient pointwise and blockwise encrypted operations
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