Ключевые слова: allies, alphabetic, army, century, cipher, code, communication, computer, cryptanalysis, decrypting, decryption, device, document, electromechanical, encrypting, encryption, enigma, german, germany, historic, historical, history, incandescent, intelligence, key, letter, machine, mechanical, military, number, old, past, polyalphabetic, radio, record, rotor, rotor machine, russian, scrambler, second world war, secret, secret messages, sign, signal, symbol, technology, transmissions, war, warfare, world,