Why is no one allowed to know who you have voted for?

• To ensure that the voting process is free and safe
  Explanation:

  "In Australia, voting in an election is by secret ballot, so you are free and safe to vote for any candidate. No one is allowed to know whom you have voted for unless you choose to tell them."
• To protect the identity of political candidates
• To prevent election fraud
• To avoid influencing others' voting choices