Quantifying Information Flow

  title={Quantifying Information Flow},
  author={Gavin Lowe},
We extend definitions of information flow so as to quantify the amount of information passed; in other words, we give a formal definition of the capacity of covert channels. Our definition uses the process algebra CSP, and is based upon counting the number of different behaviours of a high level user that can be distinguished by a low level user. 
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