telegraphic message
61Index of coincidence — In cryptography, coincidence counting is the technique (invented by William F. Friedman[1]) of putting two texts side by side and counting the number of times that identical letters appear in the same position in both texts. This count, either as …
62Morse code abbreviations — differ from prosigns for Morse Code in that they observe normal interletter spacing; that is, they are not run together the way prosigns are. From 1845 until well into the second half of the 20th century, commercial telegraphic code books were… …
63List of defunct United States congressional committees — The United States Congress has operated with more than 1500 standing, special, select, or joint committees over the years.[1][2][3] Many committees of these committees are now defunct. In some cases, their responsibilities were merged with other… …
64One-time pad — Excerpt from a one time pad In cryptography, the one time pad (OTP) is a type of encryption, which has been proven to be impossible to crack if used correctly. Each bit or character from the plaintext is encrypted by a modular addition with a bit …
65Samuel F. B. Morse — Infobox Celebrity name = Samuel F. B. Morse caption = Samuel Finley Breese Morse, ca. 1845 birth date = birth date|1791|4|27|mf=y birth place = Charlestown, Massachusetts death date = death date and age|1872|4|2|1791|4|27|mf=y death place = 5… …
66Gilad Shalit — גלעד שליט Gilad Shalit on the phone with his parents, after arriving in Israel on 18 October 2011 Born 28 August 1986 (1986 08 28) …
67Pearl Harbor advance-knowledge debate — The Pearl Harbor advance knowledge debate is a dispute over what, if any, advance knowledge American officials had of Japan s December 7, 1941 attack on Pearl Harbor.Ever since the Japanese attack there has been debate as to how and why the… …
68Code (cryptography) — For other uses, see Code (disambiguation). In cryptography, a code is a method used to transform a message into an obscured form, preventing those who do not possess special information, or key, required to apply the transform from understanding… …
69Spam (electronic) — An email box folder littered with spam messages A typical spam m …
70United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
