Didactic XOR
Posted: Thu Oct 16, 2008 1:39 am
dsaf
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Posted: Wed Sep 14, 2011 5:17 pm
Had no idea what this XOR business is all about at school. But now I do understand a bit, love this site
Posted: Wed Jan 04, 2012 2:15 pm
My solution in ruby:
Code: Select all
input = ["9f", "c7"]
input.map! {
|x| x.to_i(16)
}
output = input.first ^ input.last
puts output.chrPosted: Fri May 04, 2012 11:33 am
Use "calc.exe" in Scientific mode. Select Hex as numeration base then XOR 9f with c7.
=> 58 which converted to ASCII = 'X'
Python:
=> X
=> 58 which converted to ASCII = 'X'
Python:
Code: Select all
a = 0x9f
b = 0xc7
print chr(a^b)Posted: Wed Jul 25, 2012 8:44 pm
XOR -- this is Exclusive OR
Take your numbers
Convert to binary first on top of the second
Anywhere there is a 1 or 0 then it is a 1
Anywhere there is a 1 and 1 or 0 and 0 then it is a 0
Take your numbers
Convert to binary first on top of the second
Anywhere there is a 1 or 0 then it is a 1
Anywhere there is a 1 and 1 or 0 and 0 then it is a 0
Posted: Sun Mar 03, 2013 12:37 pm
Python is faster:wynk wrote:My solution in ruby:
Code: Select all
input = ["9f", "c7"] input.map! { |x| x.to_i(16) } output = input.first ^ input.last puts output.chr
Code: Select all
"%c"%(0x9f ^ 0xc7)
Posted: Mon Sep 16, 2013 5:37 pm
I don't know if i missed something here, But I used the same method 'calc.exe'lortedy wrote:Use "calc.exe" in Scientific mode. Select Hex as numeration base then XOR 9f with c7.
=> 58 which converted to ASCII = 'X'
Python:=> XCode: Select all
a = 0x9f b = 0xc7 print chr(a^b)
I got 58 but in ascii 58 = :
so i tried : and it was a error.
I converted it to .decimal and it was 88(x)
Which worked.
So isn't 58 on ascii table this symbol : ??
Posted: Wed Jan 13, 2016 2:36 am
I solved this puzzle by hand ;-;