Speck
- authors:
Ray Beaulieu, Douglas Shors, Jason Smith, Stefan Treatman-Clark, Bryan Weeks, Louis Wingers
- title:
SIMON and SPECK: Block Ciphers for the Internet of Things
- year:
2015
- link:
The Speck block cipher [BSS+15] has reference configurations suitable for many sizes. Even if the implementation could actually work in the most general scenario, the suggested size is any multiple of 4 bits, i.e. \(t = 2\tau,\ \tau \in \mathbb{N}\).
\[\begin{split}\begin{array}{l}
\texttt{text\_size} = 2t, \quad t \in \mathbb{N} \\
\texttt{key\_size} = 2kt, \quad k \in \{2, 3, 4\} \\
\alpha < t \\
\beta < t
\end{array}\end{split}\]