The best attack so far on the TPypy is by Sekar et al. which is a distinguishing attack with data complexity 2 .
The TPypy is conjectured to be the strongest of the Py - family of ciphers .
The best attack so far on the TPypy , which is conjectured to be the strongest of the Py - family of ciphers , is by Sekar et al. which is a distinguishing attack with data complexity 2 .