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Following a sequence of hardware designs for a fully homomorphiccrypto-processor - a general purpose processor that natively runs encryptedmachine code on encrypted data in registers and memory, resulting in encryptedmachine states - proposed by the authors in 2014, we discuss a workingprototype of the first of those, a so-called `pseudo-homomorphic' design. Thisprocessor is in principle safe against physical or software-based attacks bythe owner/operator of the processor on user processes running in it. Theprocessor is intended as a more secure option for those emerging computingparadigms that require trust to be placed in computations carried out in remotelocations or overseen by untrusted operators.  The prototype has a single-pipeline superscalar architecture that runsOpenRISC standard machine code in two distinct modes. The processor runs in theencrypted mode (the unprivileged, `user' mode, with a long pipeline) at 60-70%of the speed in the unencrypted mode (the privileged, `supervisor' mode, with ashort pipeline), emitting a completed encrypted instruction every 1.67-1.8cycles on average in real trials.

A First Practical Fully Homomorphic Crypto-Processor Design: The Secret Computer is Nearly Here