Modes of Operation for Compressive Sensing based Encryption

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Compressive Sensing is a promising technology, which provides a very efficient way to sample and compress sensoric data. Sensoric data are very sensitive under security aspects und should be kept confidential. Therefore solutions have been developed and published, which provide confidentiality by encryption. Nevertheless these encryption algorithms specify the encryption of single input vectors only. This results in identical cipher text vectors for identical clear text vectors. This is not acceptable under security aspects. Therefore, this research project will develop modes of operation for Compressive Sensing based encryption, which define, how compressive sensing based encryption can be used in practice. The modes of operation of block ciphers specified in ISO 10116 can be taken as an example, but the modes of operation specified in ISO 10116 can not be applied, because the properties of the input vectors, which enable compressive sensing, would be lost by feedback to the input vectors. The new modes to be developed have to be analysed, compared and evaluated under the quality of service aspects of synchronisatiion, throughput, scalability, delay, etc. Additionally a security analysis has to be achieved for each mode, because the security level of encryption should not be reduced by the modes of operation. The modes of operation will be integrated in a real Compressive Sensing SAR application (Synthetic Aparature Radar) and tested.Following the research of modes of operation for compressive sensing based encryption, modes of operation will be developed for compressive sensing based encryption including authentication. These mode provide an "Authenticated Encryption" (comparable to ISO 19772), i.e. the data integrity and authenticity of data can be verified by the receiver. The integrity and authentication of origin of sensoric data are very important, because the actions and reactions of information processing and process control depends on the trustworthiness of the input data. It is the overall goal of the project, to perform sampling and compression (compressive sensing), encryption, data integrity and authentication of origin in one single step, if the input vectors have the appropriate properties for compressive sensing. The modes of operation respect the requirements of synchronization, throughput, scalability, robustness, security, etc.