deletions | additions       diff --git a/Block Ciphers.tex b/Block Ciphers.tex  index 711f672..586545a 100644  --- a/Block Ciphers.tex  +++ b/Block Ciphers.tex 
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\end{itemize}  \end{itemize}  \end{itemize}  \item Double Encryption: $E_{k1}(E_{k2}(m))) $E_{k2}(E_{k1}(m)))  = c$ \begin{itemize}  \item This is not $O(2^{2k})$ complexity.  \item Meet in the Middle Attack: $O(2^k)$ space $\rightarrow O(2^k)$ time.  \item Method  \begin{itemize}  \item Encrypt plaintext with each possible $k_1$ ($2^k$ keys).  \end{itemize}  \end{itemize}  \end{itemize}