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help decryptage AsCII


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#1 stickmen

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Posted 03 July 2011 - 09:37 AM

hello,
I would like to know what and how encryption kar I test with different site that offers the decoding ASCII

I have no result

Decode the string.

Rk lrgm & & & jk ik ingrrktmk & & & 8gi9 kyz @ = <:> 7gk; <ij <>? J, h? = 78; D98: k

if somebody can give me an info or a link thank you in advance

#2 tekio

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Posted 01 October 2011 - 12:12 AM

decoded ascii:

010100100110101100100000011011000111001001100111011011010010000000100110001000000010011000100000001001100010000001101010011010110010000001101001011010110010000001101001011011100110011101110010011100100110101101110100011011010110101100100000001001100010000000100110001000000010011000100000001110000110011101101001001110010010000001101011011110010111101000100000010000000010000000111101001000000011110000111010001111100010000000110111011001110110101100111011001000000011110001101001011010100010000000111100001111100011111100100000010010100010110000100000011010000011111100100000001111010010000000110111001110000011101100100000010001000011100100111000001110100010000001101011


:p

#3 TheFunk

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Posted 02 October 2011 - 04:41 PM

Forgive my stupid, but by decode ASCII, did he mean take the ASCII characters, convert them to decimal numbers then convert the decimal numbers to binary? Or is there some other step here and I'm in over my head. I'm checking to see if paying attention in school is working ;)

#4 tekio

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Posted 02 October 2011 - 05:05 PM

Forgive my stupid, but by decode ASCII, did he mean take the ASCII characters, convert them to decimal numbers then convert the decimal numbers to binary? Or is there some other step here and I'm in over my head. I'm checking to see if paying attention in school is working ;)

I was under the assumption ascii was encoded with 8bits per character, and one left over for parity checking when the standard was defined???

Bin
100 0001 A
100 0010 B
100 0011 C
100 0100 D
etc....


Everything I've read says it's 7 bits with one left for parity/error checking, and revised using 8 bits for more characters. Is that not correct?

EDIT: I think when a file is saved it is converted to a decimal ascii code. But in memory it is binary. Again, I'm not too sire though...

Edited by tekio, 02 October 2011 - 05:28 PM.


#5 serrath

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Posted 11 October 2011 - 02:47 AM

I have no idea what the original poster was actually asking.


ASCII I'm just getting to in my reading, so let me help out there:
You have five bits for data, two for the character class, and one "unused" bit that tends to get a lot more use than is recognized.


"Bit seven in standard ASCII is always zero. This means that the ASCII character set
consumes only half of the possible character codes in an eight bit byte. IBM uses the
remaining 128 character codes for various special characters including international characters
(those with accents, etc.), math symbols, and line drawing characters. Note that
these extra characters are a non-standard extension to the ASCII character set. Of course,
the name IBM has considerable clout, so almost all modern personal computers based on
the 80x86 with a video display support the extended IBM/ASCII character set. Most printers
support IBM’s character set as well."

From "The Art of Assembly" by Randall Hyde.

Edited by serrath, 11 October 2011 - 02:48 AM.


#6 Afterm4th

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Posted 19 October 2011 - 09:07 PM

Looks like a cypher to me.

If I had to guess I'd say caesar cipher with ascii.

Edited by Afterm4th, 19 October 2011 - 09:09 PM.


#7 Rift

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Posted 20 October 2011 - 12:57 PM

Looks like a cypher to me.

If I had to guess I'd say caesar cipher with ascii.


I don't think that's a Caesar Cipher as a Caesar Cipher should only shift the letters to another letter and not to punctuation.

#8 Afterm4th

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Posted 20 October 2011 - 02:43 PM


Looks like a cypher to me.

If I had to guess I'd say caesar cipher with ascii.


I don't think that's a Caesar Cipher as a Caesar Cipher should only shift the letters to another letter and not to punctuation.


what I ment was that it could be a caesar cypher with the whole ascii table, not just a to z

#9 serrath

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Posted 20 October 2011 - 06:35 PM

That'd push some things to control characters or non alphanumeric symbols. (Unless you're just rotating through the alphanumeric & regular punctuation in ASCII.) Just a glance at the frequency of some of the characters suggests to me that it's some kind of substitution algorithm, but you'd really have to have a lot of spare time to play with it to get anything out of this.




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