Joan Clarke used Banburismus to decrypt naval Enigma messages in the Alan TuringÂ­led (*) Hut of this number at Bletchley Park.
The obsolete Data Encryption Standard used this many SÂ­boxes. SÂ­boxes in AES operate on this many bits. This many Choctaw men were the first US code talkers in WWI. Enigmas in Germany's Abwehr spy service had four rotors, so their message headers had this many letters. Germany's navy selected three out of this many rotors for their Enigmas, more than the air force or army. Joan Clarke used Banburismus to decrypt naval Enigma messages in the Alan TuringÂ­led (*) Hut of this number at Bletchley Park. This number partially names the most popular variableÂ­length Unicode encoding. The ISO 8859 series of standards encode text with this many bits per character, one more than in ASCII. A one in the ones place of an Incan khipu is represented by a knot shaped like this number. In a Caesar shift by this number, the ciphertext I is produced from the plaintext A. For 10 points, give this number of bits in a byte.
The obsolete Data Encryption Standard used this many SÂ­boxes.
eight [or 8]