RSAKeyPairGenerator generator = new RSAKeyPairGenerator();
// see https://code.google.com/p/gwt-crypto/issues/detail?id=25
SecureRandom random = SecureRandom.getInstance(null);
BigInteger exponent = BigInteger.valueOf(65537);
RSAKeyGenerationParameters params = new RSAKeyGenerationParameters(
exponent,
random,
strength.strength,
80);
generator.init(params);