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Thread: hex key?????

  1. #1
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    Default hex key?????


    guys
    does anyon know ...WHAT IS HEX KEYS...
    thanks
    shalini

  2. #2
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    From Wikipedia, the free encyclopedia

    In mathematics and computer science, base-16, hexadecimal, or simply hex, is a numeral system with a radix or base of 16 usually written using the symbols 09 and AF or af. The current hexadecimal system was first introduced to the computing world in 1963 by IBM. An earlier version, using the digits 09 and uz, was used by the Bendix G-15 computer, introduced in 1956.

    For example, the decimal numeral 79 whose binary representation is 01001111 can be written as 4F in hexadecimal (4 = 0100, F = 1111). It was IBM that decided on the prefix of "hexa" rather than the proper Latin prefix of "sexa". The word "hexadecimal" is strange in that hexa is derived from the Greek έξι (hexi) for "six" and decimal is derived from the Latin for "tenth". It may have been derived from the Latin root, but Greek deka is so similar to the Latin decem that some would not consider this nomenclature inconsistent. An older term was the incorrect Latin-like "sexidecimal" (correct Latin is "sedecim" for 16), but that was changed because some people thought it too risqu, and it also had an alternative meaning of "base 60". However, the word "sexagesimal" (base 60) retains the prefix. The earlier Bendix documentation used the term "sexadecimal". Schwartzman notes: Since "hexadecimal" is a rather long word, it is sometimes abbreviated "hex". The word "hexadecimal" is unusual because Greek and Latin elements are combined; the expected purely Latin form would be "sexadecimal", but then computer hackers would be tempted to shorten the word to "sex". Donald Knuth has pointed out that the etymologically correct term is "senidenary", from the Latin term for "grouped by 16". (The terms "binary", "ternary" and "quaternary" are from the same Latin construction, and the etymologically correct term for "decimal" arithmetic should be "denary".)
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  3. #3
    az30094
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    Default Re: hex key?????

    Quote Originally Posted by shalini
    guys
    does anyon know ...WHAT IS HEX KEYS...
    thanks
    shalini
    Apart from the above technical jargon, let me put in in an earthly manner.

    We are in Sat forum and I will put it in this context. Keys in the expression refers to - well - KEYS. These are the keys needed to decode the scrambled signals. They are usually input into receiver through a special menu - or downloaded into a receiver from a Softcam file. Softcam files are also used for PC DVB devices (like Skystar etc.).

    The word Hex is nicely been explained above by cogil. In my words, the keys that you input are in numerical form (numbers). The numbers in computer world is represented in may ways - Binary (base 2 - 0 to 1), Octal (base 8 - 0 to 7) and Hex (base 16 - 0 to 9 and A to F). Decimal (base 10 - 0 to 9) is also used but after being recoded into another digital format called BCD.

    Hope this is clear to you.

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    very good explanation
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    thankyou guys
    u all rock...keep it up
    shalini

 

 

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