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Rollback detection

If your implementation of Adobe Access uses business rules that require the client to maintain state (for example, the playback window interval), Adobe highly recommends that the server keep track of the rollback counter and use AIR or SWF whitelisting.
The rollback counter is sent to the server in most requests from the client. If your implementation of Adobe Access does not require the rollback counter, it can be ignored. Otherwise, Adobe recommends that the server store the random machine ID—obtained using MachineToken.getMachineId().getUniqueId() —and the current counter value in a database. For more information on incrementing and tracking the rollback counter, see ClientState in Adobe Access API Reference and Rollback detection in Using the Adobe Access SDK for Protecting Content .