deletions | additions       diff --git a/Block Ciphers.tex b/Block Ciphers.tex  index a7bf944..ff48c97 100644  --- a/Block Ciphers.tex  +++ b/Block Ciphers.tex 
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\end{itemize}  \item Data Encryption Standard (DES)  \begin{itemize}  \item NIST Standard  \begin{itemize}  \item 56-bit keys (due to 8th bit of every byte being a parity bit)  \item 64-bit block size  \end{itemize}  \item Invented by IBM  \item Attack: Linear Cryptanalysis - Relationships between plaintext & ciphertext (supposedly NSA improved DES to be resistent to this attack)  \item Replaced by AES  \end{itemize}  \item Advanced Encryption Standard (AES)  \begin{itemize}  \item Rijndael  \begin{itemize}  \item 128-bit blocksize  \item 128/192/256-bit keysizes  \end{itemize}  \item Fast + low gate count  \end{itemize}  \item RC5: Ron's Code 5  \begin{itemize}  \item Simple, fast  \item 32/64/128-bit block size  \item 0-2040-bit key size  \end{itemize}  \end{itemize}