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Composite Signal Representation for Fast and Storage-Efficient Processing of Encrypted Signals

机译:复合信号表示,可快速有效地处理加密信号

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摘要

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.
机译:直接处理加密数据的信号处理工具可以为必须保护敏感信号免受不受信任的处理设备影响的应用场景提供有效的解决方案。在本文中,由于使用了在非常大的代数结构上运行的密码系统,我们考虑了从纯文本传递到信号的加密表示所需的数据扩展。提出了一种通用的复合信号表示形式,它允许我们将多个信号样本打包在一起并将其作为唯一的样本进行处理。所提出的表示使我们能够通过并行处理来加快对加密信号的线性操作,并减小加密信号的大小。一维线性滤波案例研究显示了所提出表示形式的优点,并提供了一些关于信号处理算法的见解,这些算法更适合于合成表示形式。

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