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I want to restrict access to a particular resource based on time (configurable). So suppose user A has time t configured from him. He can access the resource only once every t time units. The values of t can be from a fixed set but not a very small set. I was thinking of using multiple hash chains to encrypt the data, but I am looking for something more scalable.

Any suggestions?

Ruchir Patwa
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  • I'm interested in your question but you've lost me with the sentence about hash chains. – kgilpin Oct 17 '13 at 12:23
  • just to make it clear I am using multiple hash chains to generate keys that will be used to encrypt data. The data value of the resource keeps changing very frequently. Does that make it clear? – Ruchir Patwa Oct 17 '13 at 21:24

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