151 should emerge from $A$ then Alice is in trouble and Bob will

   151 should emerge from $A$ then Alice is in trouble and Bob will

   152 find out she does not know the secret. So in order to fool Bob

   152 find out she does not know the secret. So in order to fool Bob

   153 she needs a protocol that anticipate his call, and already go

   153 she needs a protocol that anticipate his call, and already go

   154 into this tunnel. 

   154 into this tunnel. 

   155 

   155 

   156 

   157 

   157 \end{document}

   158 \end{document}

   158 

   159 

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