Authentication is the process of proving that you are authorized to participate in operations/information etc.
Example: The radio station KEULE wants to check whether the radio station EREMIT is authorized for the radio circuit:
EREMIT, KEULE here, what is the authentication for YANKEE,...
A Talking Board is used to either simplify or encode the communication, i.e. to disguise the actualto disguise the actually transmitted content for unintended listeners and readers.
Essential components of a Talking Board are
Directory of aliasesDirectory of cover wordsDirectory of cover...
Interpreting Befunge programs
Just switch to Interpreter and enter the program.
The Input field is used when input is necessary. All input has to be seperated by spaces.
The Debug Section provides further stepwise informtaion how the program was executed.
For every step of...
CCIR 476 is a character encoding used in radio data protocols such as SITOR, AMTOR and Navtex. It is a rewrite of the ITA2 character encoding, expanded from a five-bit code to a seven-bit code.
In each character, exactly four of the seven bits are...
The IRA is the further development of the IA No. 5.
T.50 : International Reference Alphabet (IRA) (Formerly International Alphabet No. 5 or IA5) - Information technology - 7-bit coded character set for information interchange (itu.int).
This recommendation specifies a 7-bit encoded character...
ITA-5 is a 7-bit code in addition to ITA-2.
T.50 : International Alphabet No. 5 (itu.int)
This recommendation specifies a set of 128 characters (control characters and graphic characters likeletters, numerals and symbols) with their coded representation.
Most of these characters...
With the progressive development, introduction and use of telex, there was a need to further develop the telegraph alphabet as well.
The International Telegraph Alphabet No. 4 was developed for transmission with a 6-bit synchronous time-division 2-3-channel multiplex system for connection to...
When transmitting telexes with 5-bit codes, e.g. ITA-2, over radio links, considerable error rates may occur. For this case the ITU recommendation p.13 recommends the use of a 7-bit ARQ system with the International Telegraph Alphabet No. 3.
S.13 : Use on radio circuits of 7-unit synchronous...
Baudot code - Wikipedia
To facilitate character entry, Donald Murray around 1901 developed a keyboard similar to that of a typewriter, which punched the associated string of five bits into a punched tape by pressing a single key.
Murray retained Baudot's level switching, but rearranged...
Baudot code - Wikipedia
The original Baudot code (later International Telegraph Alphabet No. 1 (ITA1), CCITT-1) was designed by Émile Baudot in 1870 for a telegraph apparatus he developed.
Baudot applied for a patent for his invention
in France: January 06, 1882, No. 146,716in Belgium:...
The Enigma (from the Greek word "ainigma" = riddle) is the undisputed star among the encryption machines of the Second World War. Not because it is the best, but because it is by far the best known. Whereby it was really good and almost impossible to crack.
Purely technically, Enigma is a rotor...
Predator is the character set used in the movie of the same name.
The Swedish poet and inventor Abraham Niclas Edelcrantz developed a telegraph system based on 10 keys in 1794. His book "Afhandling om telegrapher och försök til en ny inrättning däraf" can be found in...
At present, the following code tables are stored for use with punched tape:
Baudot code, US patent 1888Baudot code, 1926Murray code, 1926Siemens code, 1926Western Union code, 1926CCITT ITA-1, 1926CCITT ITA-1, 1929CCITT ITA-1, Europe/ContinentCCITT ITA-1, UKCCITT ITA-2, 1929CCITT ITA-2, 1931CCITT...
The entered text is immediately encoded and output graphically.
Functions are available for the output:
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The character is entered by clicking on the segments.
The following functions are available for entering characters:
In 1815, Admiral Sir Home Riggs Popham developed a type of two-armed semaphore that could be used on water and land. The mast had a height of 30 feet; the arms were each 8 feet long.
The arms were attached at about 4m height or at the top. When at rest, they ran parallel to the mast.
...proposed a further development in 1823.
Description of the universal telegraph, for day and night signals - sir Charles William Pasley - Google Books
The system also consisted of one mast, but the two wing arms were mounted together at the top of the mast.
The system was used until...
The functionality of CCITT includes
a function for encoding texts in decimal or binary numbers or decoding them according to the CCITT standardsa function for encoding texts in punched tape or decoding punched tape according to CCITT standardsthe display of different symbol tables of the CCITT...
Building on the research work of Andrew S. Tanenbaum on computer networks and operating systems, the Internet of Things and Christmas 4.0, Peter Reichl et al at the University of Vienna have looked more closely at the question: how does Santa Claus...
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