--- a/hws/hw08.tex	Sat Sep 23 19:39:53 2017 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,42 +0,0 @@
-\documentclass{article}
-\usepackage{../style}
-
-\begin{document}
-
-
-% For Alice to cheat, she has to get her transaction into the blockchain.
-% For this she has to solve proof-of-work puzzles faster than anybody
-% else. Is it possible for her to precompute several blocks that would
-% validate a fraudulent transaction by her? Give a short explanation
-% for your reasoning.  
-
-\section*{Homework 7}
-
-\HEADER
-
-\begin{enumerate}
-\item How can the hardness of the proof-of-work puzzles in
-      Bitcoins be adjusted? What is parameter that determines
-      how the hardness is adjusted?
-
-\item What is the main data that is stored in Bitcoin's
-      blockchain? 
-      
-\item What is is the purpose of the proof-of-work puzzle in
-      Bitcoins?      
-
-\item The department has large labs full of computers that are
-      pretty much idle over night. Why is it a bad idea to let
-      them mine for Bitcoins?
-
-\item Is it possible that Bitcoins can get lost (be
-      irretrievable)?
-
-\item \POSTSCRIPT      
-\end{enumerate}
-\end{document}
-
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