Ballot Casting (moca-ballot-casting)

Fifth part of the MoCa QR Voting System project.

Records and uploads the encrypted ballot of the selection of the voter to the Bulletin Board server, subsequently to verify the signature of the voter.

Files

1. InputReader.java: Main class of the program which uses as input device a QR-codes reader. There are all the logic and methods for the recording of the QR-code, download the public information, verify the signature, and finally upload the encrypted value to the Bulletin Board server.

2. InputCamera.java: Main class of the program which uses as input device a camera. There are all the logic and methods for the recording of the QR-code, download the public information, verify the signature, and finally upload the encrypted value to the Bulletin Board server.

3. GUIJavaFX.java: Class that manages the JavaFX GUI environment. his environment also needs the presence of the following files: mainWindow.fxml, configWindow.fxml, castingWindow.fxml, MainWindowController.java, ConfigWindowController.java, CastingWindowController.java, javaFx.css and background.jpg.

4. VoterPublicKeyResponse.java: Class for the creation of the Voter Public Key object after the retrieving of the JSON from the Bulletin Board server.

5. VoterPublicKey.java: Class for the creation of the object after the retrieving of the JSON from the Bulletin Board server.

External Libraries

1. ZXing: Java library for the 1D/2D barcode image processing.
2. Gson: Java library to convert Java Object to their JSON representation and viceversa.
3. Webcam Capture API: Java library to access directly from code to build-in or connected via USB cameras.

How to Use

• Download the .jar file here.
• Put the file castBallot.jar in the project folder.
• Execute ballotVerification.jar with $ java -jar castBallot.jar

Configuration

• First of all you have to configure the root address for the Bulletin Board server. Select 'Configure Bulletin Board address' and introduce the address.
• The address is now shown on the top box of the window.

Casting Process (using InputReader)

• Select 'Ballot Casting'.
• First, the program asks for the voter id who is casting the ballot.
• Next, the program asks to read the encrypted QR-code value.
• The program downloads the public information of the voter and verifies the signature.
• If success, the program uploads the encrypted ballot to the Bulletin Board server.
• After this, the program finishes, waiting for the next voter to cast her ballot.