final Entropy entropy = reqClientEntropy?eleFac.createEntropy(secret):null;
final RenewTarget target = eleFac.createRenewTarget((SecurityTokenReference)itc.getUnAttachedSecurityTokenReference());
RequestSecurityToken rst = null;
try {
rst = eleFac.createRSTForRenew(tokenType, requestType, null, target, null, null);
rst.setEntropy(entropy);
rst.setKeySize(skl);
rst.setKeyType(URI.create(wsTrustVer.getSymmetricKeyTypeURI()));
rst.setComputedKeyAlgorithm(URI.create(wsTrustVer.getCKPSHA1algorithmURI()));
} catch (WSTrustException ex){