forked from TrueCloudLab/tzhash
Tillich-Zémor hashing golang implementation
c68e38b943
Right now AVX2 implementation looses to C binding in speed. This is probably, because of 2 things: 1. Go does not inline `mulBitRightx2` in loop iteration. 2. `minmax` is loaded every time from memory. In this PR: 1. Unroll `mulBitRightx2` manually and use `mulByteRightx2` instead. 2. Generate `minmax` in place without `LOAD/LEA` instructions. |
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| .circleci | ||
| cmd | ||
| gf127 | ||
| gogf127 | ||
| tz | ||
| .gitignore | ||
| auto.sh | ||
| benchmark | ||
| Dockerfile | ||
| go.mod | ||
| go.sum | ||
| LICENSE | ||
| Makefile | ||
| README.md | ||
Demo
In project root:
# show help
make
# run auto demo
make auto
Homomorphic hashing in golang
Package tz containts pure-Go implementation of hashing function described by Tillich and Źemor in [1] .
There are existing implementations already (e.g. [2]), however it is written in C.
Package gf127 contains arithmetic in GF(2^127) with x^127+x^63+1 as reduction polynomial.
Description
It can be used instead of Merkle-tree for data-validation, because homomorphic hashes are concatable: hash sum of data can be calculated based on hashes of chunks.
The example of how it works can be seen in tests.
Benchmarks
AVX vs AVX2 version
BenchmarkAVX-8 500 3492019 ns/op 28.64 MB/s 64 B/op 4 allocs/op
BenchmarkAVX2-8 500 2752693 ns/op 36.33 MB/s 64 B/op 2 allocs/op
BenchmarkAVX2Inline-8 1000 1877260 ns/op 53.27 MB/s 64 B/op 2 allocs/op
Contributing
At this moment, we do not accept contributions. Follow us.
Makefile
→ make
Usage:
make <target>
Targets:
attach Attach to existing container
auto Auto Tillich-Zémor hasher demo
down Stop demo container
help Show this help prompt
up Run Tillich-Zémor hasher demo
Links
[1] https://link.springer.com/content/pdf/10.1007/3-540-48658-5_5.pdf