CS691 E-Voting System

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
Implementations 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 theyre
  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, "Her
e'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 ?