| info.txt |
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190 |
| zfec.cpp |
Tables for arithetic in GF(2^8) using 1+x^2+x^3+x^4+x^8
See Lin & Costello, Appendix A, and Lee & Messerschmitt, p. 453.
Generate GF(2**m) from the irreducible polynomial p(X) in p[0]..p[m]
Lookup tables:
index->polynomial form gf_exp[] contains j= \alpha^i;
polynomial form -> index form gf_log[ j = \alpha^i ] = i
\alpha=x is the primitive element of GF(2^m)
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18569 |
| zfec.h |
A forward error correction code compatible with the zfec
library (https://github.com/tahoe-lafs/zfec)
This algorithm is *not constant time* and is likely succeptible to
side channels. Do not use this class to encode information that
should be kept secret. (If nothing else, because the first K shares
are simply the original input!)
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2599 |
| zfec_sse2 |
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| zfec_vperm |
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