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Bujbarova M., Vynogradov Y., Priymak V.

This paper proposes a method for protected implementation of Discrete Fourier Transform (DFT) and Fast Fourier Transform (FFT) at remote processors of cloud systems. Proposed method ensures protection of data against unauthorized access during network transmission and during processing on remote computer systems. The method is based on stream encryption and using of additional masking for signals. The proposed procedure for data encryption and decryption after processing are described in details. A numerical example for encryption and decryption for both DFT and FFT are given. The effectiveness of proposed method is proved theoretically and experimentally.

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