Master of Science thesis Fighting Spam

import SpamCash.Utilities.Cryptotools;
import org.logi.crypto.sign.BlindSignature;
public class BlindedCoin implements java.io.Serializable
{
private byte[] bf1,bf2;
private String hashFunc,blindFunc;
private String signatureHashFunc;
private byte[] blindSignature1,blindSignature2;
public BlindedCoin(BlindFingerprint bf1,BlindFingerprint bf2)
{
this.bf1 = bf1.getBytes();
this.bf2 = bf2.getBytes();
this.hashFunc = bf1.getHashFunc();
this.blindFunc = bf1.getBlindFunc();
}
protected Signature getSignature1(RSAPublicKey pub,RSAPrivateKey
priv,RSABlindingFactor factor) throws Exception
{
return
Cryptotools.unblind(pub,Cryptotools.blindSign(priv,getFingerprint1()),factor);
}
protected Signature getSignature2(RSAPublicKey pub,RSAPrivateKey
priv,RSABlindingFactor factor) throws Exception
{
return
Cryptotools.unblind(pub,Cryptotools.blindSign(priv,getFingerprint2()),factor);
}
public Signature getAndUnblindSignature1(RSAPublicKey pub, RSABlindingFactor factor)
throws Exception
{
return Cryptotools.unblind(pub,new
BlindSignature(hashFunc,blindFunc,blindSignature1),factor);
}
public Signature getAndUnblindSignature2(RSAPublicKey pub, RSABlindingFactor factor)
throws Exception
{
return Cryptotools.unblind(pub,new
BlindSignature(hashFunc,blindFunc,blindSignature2),factor);
}
}
public void blindSign(RSAPrivateKey privateKey) throws Exception
{
Signature b1 = Cryptotools.blindSign(privateKey, getFingerprint1());
Signature b2 = Cryptotools.blindSign(privateKey, getFingerprint2());
}
this.blindSignature1 = b1.getBytes();
this.blindSignature2 = b2.getBytes();
this.signatureHashFunc = b1.getHashFunc();
private BlindFingerprint getFingerprint1()
{
return new BlindFingerprint(hashFunc,blindFunc,bf1);
}
private BlindFingerprint getFingerprint2()
{
return new BlindFingerprint(hashFunc,blindFunc,bf2);
}
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