Re: [Freedos-user] encryption program

2007-04-03 Thread Christophe Evans
Just make you own, :) 

encrypt proc far
; AL = byte to crypt
dec  al
not  al  
rol  al, 1
rol  al, 1
xor  al, KEY ; KEY = say 0ceh  or something 
ret
encrypt endp

decrypt proc far
xor  al, KEY
ror  al, 1
ror  al, 1
not  al
inc  al
ret
decrypt endp

there is also the TEA algorithm at
http://www.simonshepherd.supanet.com/tea.htm

--chris
http://nxdos.sourceforge.net/

>  Original Message 
> Subject: Re: [Freedos-user] encryption program
> From: "Jim Hall" <[EMAIL PROTECTED]>
> Date: Tue, April 03, 2007 6:15 am
> To: freedos-user@lists.sourceforge.net
> 
> I don't believe we can use this in FreeDOS.  There is no information
> in the tar file to indicate the  distribution license, so I am unsure
> how this was meant to be redistributed.  But the most obvious blocker
> is that this program is patent-encumbered, and cannot be used
> commercially (all users of the FreeDOS distribution should be free to
> use all parts of the system, whether or not they are commercial
> entities or home users.)  Here is the bit from the included man page:
> 
> >PATENT
> > IDEA is registered as the international patent  WO  91/18459
> > "Device for Converting a Digital Block and the Use thereof".
> > For commercial use of IDEA, one should contact [...]
> 
> And looking up the patent, I see it was issued 1991 with a US patent
> issued 2001.
> 



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Re: [Freedos-user] encryption program

2007-04-03 Thread Jim Hall
I don't believe we can use this in FreeDOS.  There is no information
in the tar file to indicate the  distribution license, so I am unsure
how this was meant to be redistributed.  But the most obvious blocker
is that this program is patent-encumbered, and cannot be used
commercially (all users of the FreeDOS distribution should be free to
use all parts of the system, whether or not they are commercial
entities or home users.)  Here is the bit from the included man page:

>PATENT
> IDEA is registered as the international patent  WO  91/18459
> "Device for Converting a Digital Block and the Use thereof".
> For commercial use of IDEA, one should contact [...]

And looking up the patent, I see it was issued 1991 with a US patent
issued 2001.


-jh


On 4/2/07, ice <[EMAIL PROTECTED]> wrote:
> Hello.
>
> I would suggest to add into FreeDOS any encryption utility, as "crypt"
> in the FreeBSD for example.
>
> http://vmsone.com/~decuslib/decus/secure/idea_v1_1.tar_z : IDEA
> implementation, easy to compile with "Pacific C for MS-DOS, v7.51" and
> "DJGPP Version 2.03".
>

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Re: [Freedos-user] encryption program

2007-04-02 Thread Norbert Remmel
> I would suggest to add into FreeDOS any encryption utility, as "crypt" 
> in the FreeBSD for example.
> 
> http://vmsone.com/~decuslib/decus/secure/idea_v1_1.tar_z : IDEA 
> implementation, easy to compile with "Pacific C for MS-DOS, v7.51" and 
> "DJGPP Version 2.03".

IDEA is not a free cryptographic algorithm. Its licence prohibites the
use in some cases (have a look at http://www.mediacrypt.com/ as the
patent holder for idea).

Norbert


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[Freedos-user] encryption program

2007-04-02 Thread ice
Hello.

I would suggest to add into FreeDOS any encryption utility, as "crypt" 
in the FreeBSD for example.

http://vmsone.com/~decuslib/decus/secure/idea_v1_1.tar_z : IDEA 
implementation, easy to compile with "Pacific C for MS-DOS, v7.51" and 
"DJGPP Version 2.03".

--
ice <0x696365*gmail,com>

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