Cryptanalysis of full Skipjack block cipher
Raphaël C.‐W. Phan · Electronics Letters · 2002
The first known cryptanalysis of the full 32 rounds of Skipjack, a symmetric-key block cipher, is presented. By exploiting its periodic key schedule, a complementation slide attack is mounted, requiring only 232.5 known texts and 244 encryptions. This result shows the importance of putting more emphasis on key schedule design.