This theory probably contradicts the usage of block cipher in counter mode. With them, the input block is usually full of zeros. This constraint has strengthe

This theory probably contradicts the usage of block cipher in counter mode. With them, the input block is usually full of zeros. This constraint has strengthened ciphers in the past. DJB wrote somewhere that some block cipher were broken in CBC mode (all the bock can be controlled by the attacker), while CTR mode was still safe (many bits forced to zero).