The HEAT project has a new public output: https://eprint.iacr.org/2015/337
This paper reports on a hardware architecture implementing all building blocks used in polynomial ring based fully
homomorphic schemes. As an example, the YASHE encryption
scheme is implemented on top of this architecture and the
SIMON-64/128 block cipher was executed in the encrypted domain.
The building blocks are integrated in an instruction-set
coprocessor, which can be controlled by a computer for
evaluating arbitrary functions (up to the multiplicative
depth 44 and 128-bit security level).
This implementation evaluates SIMON-64/128 in approximately
157.7s (at 143MHz) and it processes 2048 ciphertexts at once
giving a relative time of only 77ms per block. This is 26.6
times faster than the leading software implementation on a
4-core Intel Core-i7 processor running at 3.4GHz.
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