Master of Science thesis Fighting Spam

EarnedCoin ec = (EarnedCoin) usedCoins.get(new Long(c.getSerialNumber()));
Debugger.debug(getClass(), 1, "EarnedCoin found: " + ec);
Debugger.debug(getClass(), 1, "NumnberofAppearances: " +
c.getTransactionlist().numberOfAppearances(cert));
if(ec.earnedTimes - 1 < c.getTransactionlist().numberOfAppearances(cert))
return true;
Debugger.debug(getClass(), 1, "returning false.");
return false;
}
}
}
public Coin getCoinWithSerial(long serial)
{
return((EarnedCoin) usedCoins.get(new Long(serial))).coin;
}
public String toString()
{
String s = "(serialnumber,earned-count) : ";
Enumeration e = usedCoins.elements();
int i = 0;
while(e.hasMoreElements())
{
s += (EarnedCoin) e.nextElement();
if(i < usedCoins.size() - 1)
s += ", ";
i++;
}
return s;
}
private class EarnedCoin implements java.io.Serializable
{
public int earnedTimes;
public Coin coin;
}
public EarnedCoin(Coin coin)
{
this.coin = coin;
earnedTimes = 1;
}
public boolean equals(EarnedCoin ec)
{
return earnedTimes == ec.earnedTimes && this.coin.equals(ec.coin);
}
public String toString()
{
return "(" + coin.getSerialNumber() + "," + earnedTimes + ")";
}
10.2 Currency
10.2.1 BlindedCoin
package SpamCash.Currency;
import org.logi.crypto.sign.BlindFingerprint;
import java.security.interfaces.*;
import org.logi.crypto.keys.RSABlindingFactor;
import org.logi.crypto.sign.Signature;
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