def prove(x,t,kw,y):
<EOL>assertScalarType(kw)<EOL>p = generatorG2() * kw<EOL>return (p,None,None)<EOL>
Computes public key P*kw where <P> = G1. 
x, t, and y are ignored. They are included only for API compatibility with 
other Pythia PRF implementations.