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CS691 E-Voting System

CS691 E-Voting System. An Implementation overview. Main components. Language : JAVA. Server: A Certificate management server. Client: A Java service running. Communication: Java Secure Sockets. Implementation’s requirements. Digital Certificates. Sockets.

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CS691 E-Voting System

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  1. CS691E-Voting System An Implementation overview

  2. Main components • Language : JAVA. • Server: A Certificate management server. • Client: A Java service running. • Communication: Java Secure Sockets.

  3. Implementation’s requirements • Digital Certificates. • Sockets. • Encryption. (Symmetric + Public Key). • Ballots. • Hash functions. • Secure Random Numbers. • XML.

  4. DCs • Bouncy Castle library. • Open source. • Totally FREE. • A provider for the JCE. • Works for everything from J2ME to JDK1.5 • Supports V1 & V3 X509 Certificates, V2 CRLs and PKCS12 files, and much more … • http://www.bouncycastle.org/index.html

  5. Sockets • JSSE (Java Secure Socket Extension) • Pure Java implementation. • Implements SSL V3 & TLS 1.0. • SSLSocket & SSLServerSocket classes. • HTTPS support. • Package: javax.net.ssl

  6. Encryption & Hash functions • JCE (Java Cryptography Extension) • Before 1.5, it was optional. • The JDK 5.0 release comes standard with a JCE provider named "SunJCE", which comes pre-installed and registered. • Supports: DES, 3DES, Blowfish, AES, MD5, SHA1, DH, HMAC, RC2, RC4, RSA, Secure Random Numbers, …. • Packages: java.security & javax.crypto

  7. Creating a JTable Ballot • These things are pretty easy to create, and they serve our purpose quite well, best of all they’re serializable … jTable = new JTable(data, columnNames){ public Class getColumnClass(int c) { return getValueAt(0, c).getClass(); } }; Object[][] data = { {"Should we get new computers?", Boolean.FALSE, Boolean.TRUE, Boolean.FALSE}, {"Should we eat cake?", Boolean.FALSE, Boolean.FALSE, Boolean.TRUE}, {"Here's another.", Boolean.TRUE, Boolean.FALSE, Boolean.FALSE}, {"One more.", Boolean.FALSE, Boolean.TRUE, Boolean.FALSE} };

  8. Serialization try{ FileOutputStream fStream = new FileOutputStream("tabledata.dat"); ObjectOutput stream = new ObjectOutputStream(fStream); stream.writeObject(jTable); System.out.println(jTable); stream.flush(); stream.close(); fStream.close(); }catch (Exception e) { e.printStackTrace(); }

  9. XML • SAX (Simple API for XML) • Package: org.xml.sax • DOM (Document Object Model) • Package: org.w3c.dom • Of course there are a LOT of java packages to deal with XML stuff: • JAXP, JAXB, JDOM, DOM4J, JAXM, JAXR, … • Apache and Oracle have tons of XML packages too 

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