Space/time trade-offs in hash coding with allowable errors
Communications of the ACM
Spoken Language System Assessment
Spoken Language System Assessment
Binding Bit Patterns to Real World Entities
Proceedings of the 5th International Workshop on Security Protocols
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Digital documents, be they text, image, audio or video, are very easy to copy. There is therefore considerable interest on the part of some originators of digital documents in trying to control the copying of such documents. Of course, this is an impossible task (without special hardware), but it does not stop people trying. But if we cannot prevent illegal copies, we would like to be able to identify them.