Protocols for secure computations
SFCS '82 Proceedings of the 23rd Annual Symposium on Foundations of Computer Science
Protection and retrieval of encrypted multimedia content: when cryptography meets signal processing
EURASIP Journal on Information Security
Editorial: Signal processing in the encrypted domain
EURASIP Journal on Information Security
Efficient pointwise and blockwise encrypted operations
Proceedings of the 10th ACM workshop on Multimedia and security
On the implementation of the discrete Fourier transform in the encrypted domain
IEEE Transactions on Information Forensics and Security
Public-key cryptosystems based on composite degree residuosity classes
EUROCRYPT'99 Proceedings of the 17th international conference on Theory and application of cryptographic techniques
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Signal processing tools working on encrypted data provide an efficient solution when 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 signal processing, that is the huge size augmentation from the plaintext to the sample-wise encrypted representation of signals, due to the use of cryptosystems operating on very large algebraic structures. A composite signal representation is proposed that allows to speed up linear filtering on encrypted signals via parallel processing and to reduce the size of encrypted signals. A case study is proposed and discussed.