Week 3
Monday, Jan 26
Plans for teams
We will use Daniel Bernstein's ChaCha cipher as a random-number generator. See https://cr.yp.to/chacha/chacha-20080120.pdf.
ChaCha achieves cryptographic mixing through additions, xors and shifts. No multiplications or divisions are used.
echo "hello and welcome to Open Source" | shasum -a 512
python3
import numpy as np
from randomgen import ChaCha
seed=0x1234567
rg=np.random.Generator(ChaCha(seed, rounds=20)) # use
the seed from above
# now int(rg.integers(A,B)) chooses a good random value between A and B-1,
inclusive
Look at full Apache license
GPL
Wednesday
GPL patents clause; how murky is the GPL?