A KPU is a replacement for a standard CPU that natively runs encrypted machine code on encrypted data in registers and memory - a 'crypto-processor unit', in other words. Its computations are opaque to an observer with physical access to the processor but remain meaningful to the owner of the computation. In theory, a KPU can be run in simulation and remain as secure (or otherwise) as in hardware. Any block cipher with a block-size of about a word is compatible with this developing technology, the long-term aim of which is to make it safe to entrust data-oriented computation to a remote environment. Hardware is arranged in a KPU to make the chosen cipher behave as a mathematical homomorphism with respect to computer arithmetic. We describe the architecture formally here and show that 'type-safe' programs run correctly when encrypted. © Springer-Verlag Berlin Heidelberg 2013.
CITATION STYLE
Breuer, P. T., & Bowen, J. P. (2013). A fully homomorphic crypto-processor design: Correctness of a secret computer. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 7781 LNCS, pp. 123–138). https://doi.org/10.1007/978-3-642-36563-8_9
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