deletions | additions       diff --git a/Digital Signatures and MACs.tex b/Digital Signatures and MACs.tex  index 7e435a2..fe2c444 100644  --- a/Digital Signatures and MACs.tex  +++ b/Digital Signatures and MACs.tex 
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\begin{itemize}  \item $\text{MAC}_k(\text{username}) = \text{crypt}(\text{user }||k)$  \item Unfortunately, crypt truncated the user input after 8 characters  \item Thus, inputting a 7 char username made it trivially easy to generate the first character of the secret key. (and then you could generate more and more elements...)  \end{itemize}  \end{itemize}  \end{itemize}