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.

def prove(x,t,kw,y):
    """
    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.
    """
    # Verify the key type and compute the pubkey
    assertScalarType(kw)
    p = generatorG2() * kw
    return (p,None,None)