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Security is a foremost concern for us, here at PlayFab, and it's a fundamental reason why games need a backend service. Any data which originates from a user-controlled device must be treated with suspicion, and any non-secure communications must also be considered suspect. Solving for the latter is straightforward - PlayFab secures all communications with clients via SSL, in order to help prevent third parties from interfering in any way. Solving for the former requires moving the authority for decision-making to the server - which is a primary driver in the planning and delivery of the PlayFab service suite. From secure purchase processes, which use trusted server-to-server interactions to ensure players get what they pay for (and pay for what they get) to server-based statistics and inventory management, our goal is to ensure that your title is seen as having a fair playground for users.