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Hace 21 horas · The Enigma machines produced a polyalphabetic substitution cipher.During World War I, inventors in several countries realized that a purely random key sequence, containing no repetitive pattern, would, in principle, make a polyalphabetic substitution cipher unbreakable. This led to the development of rotor machines which alter each character in the plaintext to produce the ciphertext, by means ...
Hace 21 horas · Father Knows Best is an American sitcom starring Robert Young, Jane Wyatt, Elinor Donahue, Billy Gray and Lauren Chapin.The series, which began on radio in 1949, aired as a television show for six seasons and 203 episodes. Created by Ed James, Father Knows Best follows the lives of the Andersons, a middle-class family living in the town of Springfield.
