GIFT Lightweight Block Cipher GIFT-64 and GIFT-128 Specification $\texttt{GIFT-64-128}$ $\texttt{GIFT-128-128}$ Block Size (bits) 64 128 Key Size (bits) 128 128 Round Key Size (bits) 32 64 Number of Rounds 28 40 Design Strategy Substitution-Permutation Network Substitution-Permutation Network