Master of Science thesis Fighting Spam

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writeMimeFile(msg, "data/testMessages/testResult/HeaderCoinRemoved_from_testMessageHTML.msg"); restored. -------- } //printing information from coin[] to ensure that the Coin[] was succesfully //System.out.println(coin[0].getValue()); //System.out.println(coin[1].getValue()); //Debugger.debug(className,3,coin[0]+""); //Testing addAttachment... -------------------------------------------------- Debugger.debug(className,3,"Testing addAttachment..."); //Adding to an HTML message Debugger.debug(className,3,"Adding to an HTML message..."); test("testMessageHTML", false); //Adding to an HTML message with attachment Debugger.debug(className,3,"Adding to an HTML message with attachment"); test("testMessageHTML", true); //Adding to an Plain text message Debugger.debug(className,3,"Adding to a Plain text message"); test("testMessagePlain", false); //Adding to an Plain text message with attachment Debugger.debug(className,3,"Adding to a Plain text message with attachment"); test("testMessagePlain", true); //Testing remove attachment... testAddRemoveCoin("testMessageHTML"); testAddRemoveCoin("testMessageHTMLandAttachment"); testAddRemoveCoin("testMessagePlain"); testAddRemoveCoin("testMessagePlainandAttachment"); Debugger.debug(className,3,"Test complete."); } catch(Exception e) { Debugger.debug(className,3,"Error ... \n"+e,e); } public static void test(String name, boolean attachment) throws Exception { MimeMessage msg = readMimeFile("data/testMessages/" + name + (attachment ? "andAttachment" : "") + ".msg"); msg = addAttachment(msg, "data/testMessages/" + name + (attachment ? "andAttachment" : "") + ".msg"); writeMimeFile(msg, "data/testMessages/testResult/" + name + (attachment ? "andAttachment" : "") + "_testedAttach" + ".msg"); } private static void testAddRemoveCoin(String filename) throws Exception { Debugger.debug(className,3,"Testing add/remove coin to " + filename + "..."); Coin[] coins = new Coin[] {new Coin(3.3,1243432,System.currentTimeMillis(),10,null,null), new Coin(3.3,1243432,System.currentTimeMillis(),10,null,null)}; MimeMessage msg = readMimeFile("data/testMessages/" + filename + ".msg"); MimeMessage orig = msg; //Debugger.debug(className,3,"Coin 1 before: " + coins[0]); //Debugger.debug(className,3,"Coin 2 before: " + coins[1]); msg = addAttachments(msg, coins); writeMimeFile(msg, "data/testMessages/testResult/" + filename + "_tested_attach_coin.msg"); Coin[] coin2 = (Coin[])getCoins(msg); MimeMessage msg2 = removeAttachment(msg); //Debugger.debug(className,3,"Coin 1 after: " + coin2[0]); 408
} //Debugger.debug(className,3,"Coin 2 after: " + coin2[1]); Debugger.debug(className,3,"Restored message? : " + orig.equals(msg2)); writeMimeFile(msg2, "data/testMessages/testResult/" + filename + "2.msg"); public static MimeMessage addAttachmentHeader(MimeMessage message, Object o) throws Exception { String encodedcoins = encodeCoins(o); int number<strong>of</strong>headers = (int)(encodedcoins.length()/Config.maxHeaderSize)+1; for (int i=0;i
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IMM, DTU, Projekt nummer: 19 1. Apr
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Indholdsfortegnelse 1 Indledning...
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6.8.2 Blacklistserver..............
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10.1.4.e ErrorDialog...............
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Abstract Up until now spam email ha
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syvende og sidst er det dog op til
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Denne definition kan virke en smule
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3 Spambekæmpelse I dette afsnit vi
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fange de allerførste spammails af
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kaldes list-splitting [15] og benyt
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uger afgør, om en modtaget email k
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om retslige forhold i afsnit 3.6).
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Systemet minder om en simpel løsni
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De mest udbredte løsninger på spa
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paradoks, men et måske ikke så in
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(a) Original (a) Original (a) Origi
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4.3 Asymmetrisk kryptografi Et af d
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4.4 Blinde signaturer i RSA Blinde
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De resterende dele af denne rapport
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5.4 Betalingssystemer Når et nyt b
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Brugere af et offline system kan ik
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I systemet præsenteret af Tewari,
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At opdele informationen om brugerne
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- Proxyprogrammet skal tilbyde sikk
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En bruger af systemet vælger at in
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6 Design 6.1 Systemstruktur I analy
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(bl.a. i afsnit 6.3.2.a) beskrives
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6.3.1 Betaling I afsnit 5.2 blev de
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Serienummeret benyttes til detektio
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6.3.3 Økonomisk misbrug 6.3.3.a Mo
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Indløsning af stjålne mønter Nå
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Figur 12 C kopierer en mønt og ind
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kopi af mønten, eller en mønt hvo
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meget tæt på 0. I praksis er en b
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6.6.5 Use Case 4a: Afsend email Sce
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6.6.10 Use Case 8: Indløs penge Ud
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6.7.2 Netværkssikkerhed I det føl
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6.8 Kommunikationsprotokoller og se
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Ved at give klienterne mulighed for
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to måder. Pengeserveren opretter f
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synes det rimeligt at antage, at kl
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Mere konkret udfører pengeserveren
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Figur 22 - Oprettelsesproceduren, h
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telnet mail.ishoejby.dk 25 220-Welc
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med mailserveren og overtage dennes
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lov at slippe igennem. Skulle det s
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vigtigste objekter for at give et o
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Figur 26 getSafe()-funktionen. Denn
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Det uddybes nu præcis hvilke signa
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Modtagelse af email i IMAP (Use Cas
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Figur 32 Diagrammet viser, hvordan
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Kopiering af penge Det vil altid v
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mønter. Mere kritisk er det, hvis
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7 Implementation Med udgangspunkt i
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protokollen beskrevet i afsnit 4.4
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oprettelse. Først når brugeren tr
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Figur 34 Klassediagram for Proxy-pa
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Figur 35 Klassediagram for serverpa
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udskrevet i terminalen. Findes der
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ved at udføre trin 7 og trin 8). H
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8 Evaluering Formålet med at imple
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- Indkasser SpamCash . Brugeren mar
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I alle følgende Modtag email -case
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færdig. Derudover blev der sendt o
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- CurrencyBlindingFactorPacket(Blin
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RS Registreringsserver Registrering
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I pengeserveren skal det fastsætte
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Oprettelsesbeløb Oprettelse i syst
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ingen vil benytte systemet. At skul
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8.3.1.a Emailhåndtering SpamCash-s
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klienten brug for mindre, kunne den
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af systemet checker mail døgnet ru
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9 Konklusion Dette afsluttende kapi
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Som systemet er nu, udføres automa
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Appendiks A Installationsvejledning
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A.2 Installation og start af klient
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A.6.2 OpenSSL Oprettelse af certifi
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Appendiks B Brugsvejledning B.1 Spa
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For at starte registreringsprocedur
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Figur 43 Hovedvinduet under fanebla
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Figur 46 Fejlbesked ved åbning af
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Under møntantallene kan ses en lis
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Sker der en fejl eller er det ikke
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Figur 55 B.6.5 Opdater whitelist Di
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Appendiks C Litteratur I følgende
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[45] Levente Buttyán and Jean-Pier
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SpamCash 175
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GUI 177
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MailHandler 179
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Safe 181
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NetworkPackets 183
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CES 185
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Utilities 187
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Appendiks E Logfil Herunder ses et
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Appendiks F Maple kode Herunder ses
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Appendiks G Matlab kode I dette app
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Appendiks H JAVA Kode I dette bilag
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10.4.4 BLS ........................
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10 Kildekode 10.1 Client 10.1.1 Con
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throw new Exception("Error"); regis
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NotificationHeader header = new Not
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catch(ConnectException ex) { error
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throw new Exception( "An error has
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} Debugger.debug(getClass(), 1, "Co
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} MimeMessage ext2 = MimeTools.read
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addType1(c, privkey2, address4); ad
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public CurrencyExchangeClient() thr
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} return(int) (amount / Config.coin
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private PlusMinusListener plusMinus
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} } } setText(updateField(getText()
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} catch(Exception e) { return false
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"CheckBoxMenuItem.acceleratorSelect
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"InternalFrame.minimizeIcon", javax
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"PopupMenu.selectedWindowInputMapBi
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"TabbedPane.focusInputMap", javax.s
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"Tree.focusInputMap", javax.swing.p
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} } UIDefaults uiDefaults = UIManag
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} } } } 10.1.4.e ErrorDialog packag
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} } } labels[i].setHorizontalTextPo
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y = (buttonHeight - (int) bounds.ge
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"file.separator") "corner.gif")); s
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public void updateMailList() { if(s
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} else safeDialog.show(OpenSafeDial
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} } browsePanel.setLayout(new Borde
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} { } Dimension screenSize = Toolki
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} } { } System.out.println("Couldn'
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if(logonPanel.textFields[1].getText
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} } add(Box.createVerticalStrut(Def
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} } Dimension screenSize = Toolkit.
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} } } list.setListData(control.getW
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} public Signature getRecipientSign
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Updating Blacklist control.updateBl
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Debugger.debug(getClass(), 1,"Sende
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public OutgoingMailProcessor(Contro
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} InetAddress remoteAddress = clien
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} } } catch(IOException ex) { Debug
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if(status == 2) { connections.remov
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} if(parseArgument(command, 1).equa
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import SpamCash.Utilities.*; import
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Decode buffer decoder.decode(buffer
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} } } private String getName(Socket
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private void waitForAuthentication(
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} } index++; 287 index == numberOfM
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{ } if(argument.equals("")) { long
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} long numMessages = getNumberOfMes
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*/ private void handleUidl(String a
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} } return totalSize; /** * Gets th
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} buffers = 0; //command = partialM
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} Debugger.debug(getClass(),1,"FATA
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public void sentCoin(long serial,Ad
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public class SafeHandler implements
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} private Coin[] mergeCoinArrays(Co
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keyBytes = (byte[]) in.readObject()
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EarnedCoin ec = (EarnedCoin) usedCo
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10.2.2 Coin package SpamCash.Curren
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{ } this.value = value; this.maxNum
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this.transactionList = new Unencryp
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{ } return; public boolean verify(C
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public TransactionlistElement(Trans
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} } try { this.list.addElement(new
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} } if(elem.getCertificate().equals
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} public String toString() { return
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RSABlindingFactor[][] rsabf = new R
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10.3.11 LogonPacket package SpamCas
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} } for(int i=0;i
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10.4 Servers 10.4.1 AbstractServer
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} key); key); key); } catch(IOExcep
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public boolean needUpdate() { long
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if(a.getSerialNumber() != b.getSeri
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{ private BlackListServer BLS; priv
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System.out.println("withdrawFromUpF
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public CESCommunicationThread(Curre
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import SpamCash.Utilities.Debugger;
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} } else reportCoins(pack.coins[i],
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Exception { Debugger.debug(getClass
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f)) try { coin.insertValues(Config.
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public PendingAccounts pendingAccou
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Page 363 and 364: } public static void main(String[]
Page 365 and 366: } } } 10.5 Utilities } Debugger.deb
Page 367 and 368: } // end try catch (java.io.Unsuppo
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Page 371 and 372: * @see Base64#DONT_BREAK_LINES * @s
Page 373 and 374: } // end encodeBytes /* ******** D
Page 375 and 376: } // end if: equals sign or better
Page 377 and 378: * @param filename Filename for savi
Page 379 and 380: int numBytes = 0; // Open a stream
Page 381 and 382: ); else { return -1; } // end else
Page 383 and 384: ** * Constructs a {@link Base64.Out
Page 385 and 386: { if( position > 0 ) { if( encode )
Page 387 and 388: public final static String blacklis
Page 389 and 390: System.out.println("Encrypted mail:
Page 391 and 392: } public static boolean verify(RSAP
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Page 395 and 396: } System.out.println(); private sta
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Page 399 and 400: } } return null; public static void
Page 401 and 402: try { FileInputStream iFile = new F
Page 403 and 404: } File files[] = f.listFiles(); for
Page 405 and 406: } { } //Make the normal log-file lo
Page 407 and 408: { } FileInputStream is = new FileIn
Page 409: } } if(object instanceof Multipart)
Page 413 and 414: } found !"); newmp.addBodyPart((Mim
Page 415 and 416: { } ByteArrayOutputStream bOut = ne
Page 417 and 418: } } public synchronized MimePacket
Page 419 and 420: } } } Debugger.debug(getClass(),3,"
Page 421 and 422: } SafeHandler safe = new SafeHandle
Page 423 and 424: } { blacklist = new Blacklist(); up
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Master of Science thesis Fighting Spam

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