Probabilistic Encryption

How secure do you guys think Probabilistic encryption using a BBS generator is? It looks like its every bit as good for key exchanges as RSA and somewhat better because of its speed. Would I compromise the security of the algorithm if I modified it to take the maximum number of random bits from each itteration of the BBS RNG and made the corrosponding changes in the encryption algorithm this making it faster? How dangerous is it (looking at system wide security) to generate the random bits ahead of time? Is it overkill to disable swaping from the location the random bits are held in? (keeping in mind that disabling swapping is a major pain since it is system specific). Thanks, JWS