peatüki sissejuhatusest lk 549-552: Let us introduce Alice and Bob, two people who want to communicate "securely." This being a networking text, we should remark that Alice and Bob may be two routers that want to securely exchange routing tables, etc. We can identify the following desirable properties of secure communication: • Secrecy. Only the sender and intended receiver should be able to understand the contents of the transmitted message. Because eavesdroppers may intercept the message, this necessarily requires that the message be somehow encrypted (disguise data) so that an intercepted message can not be decrypted (understood) by an interceptor. This aspect of secrecy is probably the most commonly perceived meaning of the term "secure communication." Note, however, that this is not only a restricted definition of secure communication, but a rather restricted definition of secrecy as well
became, at age 28, the head of Amt VI E— the Amt VI section for southeast Europe. He soon grew friendly with Hungarian Army intelligence, whose chief one day showed off his communications- intelligence unit. The Hungarians did indeed have a fine organization, and it very much impressed Hottl. He thought that it did relatively more with its poor resources than did Pers z, the Forschungsamt, the German military cryptanalysts, and the police eavesdroppers all put together. In the middle of 1944, he convinced the pro-Nazi Hungarian Premier, Andor Sztojay, to have the unit furnish him with its results. The unit's commander, Major Bibo, who lived only for his work, agreed to concentrate on the traffic that Hottl wanted when Hottl promised him more men, better equipment, and extra money. Hottl went from room to room in Bibo's offices and picked out the choicest of the copious solutions. A few days later, he laid the sheaf
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