Master of Science thesis Fighting Spam

}
public static boolean verify(RSAPublicKey pub, org.logi.crypto.sign.Signature signed,
Object data) throws Exception
{
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(byteStream);
out.writeObject(data);
byte[] temp = byteStream.toByteArray();
}
byteStream.close();
out.close();
return verify(pub, signed, Fingerprint.create(temp, 0, temp.length, "SHA1"));
public static Fingerprint merge(Object obj, Fingerprint fp) throws Exception
{
ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
ObjectOutputStream out = new ObjectOutputStream(byteStream);
out.writeObject(obj);
byte[] hashed = fp.getBytes();
byte[] hashedObj = SHA1(byteStream.toByteArray()).getBytes();
byte[] result = new byte[hashed.length + hashedObj.length];
}
for(int i = 0; i < hashed.length; i++)
{
result[i] = hashed[i];
}
for(int i = 0; i < hashedObj.length; i++)
{
result[hashed.length + i] = hashedObj[i];
}
return Fingerprint.create(result, 0, result.length, "SHA1");
private static void testBlindSign2() throws Exception
{
Certificate cert = FileHandler.importCertificate(new
File(Config.BLSCertificateName));
RSAPublicKey publ = (RSAPublicKey) cert.getPublicKey();
RSAPrivateKey priv = (RSAPrivateKey) FileHandler.readObject(new
File(Config.BLSPrivateKeyName));
RSABlindingFactor bf = createBlindingFactor();
Coin coin = new Coin(Config.coinValue, 122434, System.currentTimeMillis(),
Config.maxNumberOfUsages, null, null);
bf));
}
BlindedCoin bcoin = coin.getBlindedCoin(publ, bf, cert);
Debugger.debug(className, 3, "Ok? " + coin.signAndVerify(publ, priv, cert, bcoin,
private static void testBlindSign() throws Exception
{
//generateRSAkeys();
RSAPublicKey publ = (RSAPublicKey) FileHandler.importCertificate(new
File(Config.BLSCertificateName)).
getPublicKey();
RSAPrivateKey priv = (RSAPrivateKey) FileHandler.readObject(new
File(Config.BLSPrivateKeyName));
Coin ballot = new Coin(Config.coinValue, 122434, System.currentTimeMillis(),
Config.maxNumberOfUsages, null, null);
// byte[] ballot = coin;
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