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Computer Security - Security can be fun !

 
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Old 06-28-2005, 04:09 PM   #1
Default Security can be fun !



www.copycoder.com




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Panrock
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Old 06-30-2005, 11:55 AM   #2
Lawrence D¹Oliveiro
 
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Default Re: Security can be fun !

In article <42c16833$>,
"Panrock" <> wrote:

>www.copycoder.com


It's essentially a stream cipher. And the stupid thing about it is,
every message is enciphered with the same stream! This leads to the
well-known weakness where if you can get hold of two encrypted messages,
you can XOR them and get some clues to the messages, and thereby to the
cipher as well.
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Old 06-30-2005, 04:12 PM   #3
Skycloud
 
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Default Re: Security can be fun !



"Lawrence D¹Oliveiro" <_zealand> wrote in message
news:ldo-...
> In article <42c16833$>,
> "Panrock" <> wrote:
>
> >www.copycoder.com

>
> It's essentially a stream cipher. And the stupid thing about it is,
> every message is enciphered with the same stream! This leads to the
> well-known weakness where if you can get hold of two encrypted messages,
> you can XOR them and get some clues to the messages, and thereby to the
> cipher as well.


Two things to bear in mind:

1) I don't claim this to be a serious encryption device. It's just a _toy_
for spy-minded kids.

2) Re: the single key, these little panels will be spread around so thinly
for the forseeable future that more than two people at a time are unlikely
ever to use one together. And if they do, then they'll form a sort of
copycoder 'club'... i.e, it's a game for children and teens.

Steve

PS. There was a prototype also developed using variable key codes
(hexagonal, rotatable segements containing binary-numbered element
combinations) but there was no point - software encryption is so much
better. I expect this simple version to be more successful in the market
it's intended for...

www.copycoder.com
www.radiocraft.co.uk


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Old 07-16-2005, 01:49 AM   #4
Lawrence D¹Oliveiro
 
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Default Re: Security can be fun !

In article <>, "Skycloud" <>
wrote:

>"Lawrence D¹Oliveiro" <_zealand> wrote in message
>news:ldo-...
>> In article <42c16833$>,
>> "Panrock" <> wrote:
>>
>> >www.copycoder.com

>>
>> It's essentially a stream cipher. And the stupid thing about it is,
>> every message is enciphered with the same stream! This leads to the
>> well-known weakness where if you can get hold of two encrypted messages,
>> you can XOR them and get some clues to the messages, and thereby to the
>> cipher as well.

>
>1) I don't claim this to be a serious encryption device. It's just a _toy_
>for spy-minded kids.


Won't the spy-minded kids have more fun doing this sort of thing on the
computer?
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