STOC '87 Proceedings of the nineteenth annual ACM symposium on Theory of computing
Privacy-preserving data mining
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
Cryptographic techniques for privacy-preserving data mining
ACM SIGKDD Explorations Newsletter
Collaborative Filtering with Privacy
SP '02 Proceedings of the 2002 IEEE Symposium on Security and Privacy
Privacy-Preserving Cooperative Scientific Computations
CSFW '01 Proceedings of the 14th IEEE workshop on Computer Security Foundations
A secure multidimensional point inclusion protocol
Proceedings of the 9th workshop on Multimedia & security
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
Fully homomorphic encryption using ideal lattices
Proceedings of the forty-first annual ACM symposium on Theory of computing
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
Efficient binary conversion for paillier encrypted values
EUROCRYPT'06 Proceedings of the 24th annual international conference on The Theory and Applications of Cryptographic Techniques
IEEE Transactions on Signal Processing - Part II
A buyer-seller watermarking protocol
IEEE Transactions on Image Processing
MM '11 Proceedings of the 19th ACM international conference on Multimedia
Robust watermarking of compressed JPEG images in encrypted domain
Transactions on data hiding and multimedia security VI
Private computation of spatial and temporal power consumption with smart meters
ACNS'12 Proceedings of the 10th international conference on Applied Cryptography and Network Security
Privacy preserving ECG quality evaluation
Proceedings of the on Multimedia and security
IH'12 Proceedings of the 14th international conference on Information Hiding
An efficient image homomorphic encryption scheme with small ciphertext expansion
Proceedings of the 21st ACM international conference on Multimedia
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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 consider the data expansion required to pass from the plaintext to the encrypted representation of signals, due to the use of cryptosystems operating on very large algebraic structures. A general composite signal representation allowing us to pack together a number of signal samples and process them as a unique sample is proposed. The proposed representation permits us to speed up linear operations on encrypted signals via parallel processing and to reduce the size of the encrypted signal. A case study-1-D linear filtering-shows the merits of the proposed representation and provides some insights regarding the signal processing algorithms more suited to work on the composite representation.