anyone done any encryption work with rebol
[1/8] from: bry:itnisk at: 21-Nov-2002 13:38
Specifically encrypting email, I was thinking of building a solution
where Rebol encrypts the sent email and the receiver has a rebol
installation and a key to decrypt.
So in other words I want to write both a encrypter and decrypter.
[2/8] from: lennart:nylen:biz at: 21-Nov-2002 14:14
2002-11-21 13:38:39, "bryan" <[bry--itnisk--com]> wrote:
>So in other words I want to write both a encrypter and
>decrypter.
If you have View/Rebol/Pro http://www.rebol.com/docs/encryption.html
should come in handy, but maybe you are considering implementing your
own encryption/decryption scheme? In that case I only got a few vague
ideas regarding a symmetric form of encryption I came up with a few
years ago. Nothing that's really safe or especially easy to manage.
Hmm...guess I'm not much of a help...:-)
/Lennart Fridén ([lennart--nylen--biz])
The World is not sane so why should I be?
[3/8] from: maarten:koopmans:surfnet:nl at: 21-Nov-2002 14:40
I have and am using it right now (again) for encrypting network
communication. Works great (especially as there is hardly any alternative).
--Maarten
bryan wrote:
> Specifically encrypting email, I was thinking of building a solution
> where Rebol encrypts the sent email and the receiver has a rebol
> installation and a key to decrypt.
>
> So in other words I want to write both a encrypter and decrypter.
>
--
Maarten Koopmans
Innovation manager tel: +31 30 2 305 324
SURFnet bv fax: +31 30 2 305 329
P.O.Box 19035 email: [maarten--koopmans--surfnet--nl]
NL-3501 DA Utrecht http://www.surfnet.nl
The netherlands
[4/8] from: reboler:programmer at: 21-Nov-2002 14:02
Re: anyone done any encryption work with rebol
*** NO ENCRYPTION CODE INCLUDED !!! ***
Yes, I have encrypting file-viewers/emailers for /Core, and /View.
(The /Core script may still be available in the discussion list archives.)
The main algorithm is ARCFOUR. (from a USENET algorithm, which claims to be equivalent
to RC4 of RSA, Inc)
I also use CipherSaber and CipherSaber2, which are based on ARCFOUR (do a web search
for CipherSaber for more info).
The en/decryption process is rather slow in REBOL, as you would expect, but not unreasonably
so. En/decrypting an average email of less than 1K is practically instantaneous. 50K
takes about 5 seconds, 500K about 20-25 seconds (all on Win98 with 333MgHz processor).
I also have a low security algorithm based on compression, reversal, bit-wise frame-shift,
and xor, which is much, much faster. While not secure in the cryptographic sense, I'll
wager your average spouse, boss, ISP sysadmin could not decrypt it.
FYI: With the above /View script you can
- view text and image files
- encrypt files
- email files (send & receive)
- view encrypted files without decrypting them (they are decrypted in memory, not on
disk)
Bottom Line: you don't need to pay for /Pro to get encryption.
(but I still recommend buying /Pro!)
And with roll-your-own encryption you get to see all the source code!
BTW: I have been scolded before for discussing the mechanics of encryption on an open
channel.
I will not submit any strong encryption code to this thread, through this group.
[5/8] from: gchiu::compkarori::co::nz at: 22-Nov-2002 10:58
On Thu, 21 Nov 2002 14:02:40 -0500
"alan parman" <[reboler--programmer--net]> wrote:
>BTW: I have been scolded before for discussing the
>mechanics of encryption on an open channel.
>I will not submit any strong encryption code to this
>thread, through this group.
That was Holger .. I doubt he's monitoring this list now
:)
--
Graham Chiu
[6/8] from: alans:cuervo:stanford at: 21-Nov-2002 14:44
from: Graham Chiu
> On Thu, 21 Nov 2002 14:02:40 -0500
> "alan parman" <[reboler--programmer--net]> wrote:
<<quoted lines omitted: 3>>
> >I will not submit any strong encryption code to this
> >thread, through this group.
Google will get you to everything you need to know
eventually...;^)
> That was Holger .. I doubt he's monitoring this list now
> :)
<<quoted lines omitted: 4>>
> [rebol-request--rebol--com] with "unsubscribe" in the
> subject, without the quotes.
--Alan
<[alans--cuervo--stanford--edu]>
[7/8] from: atruter:labyrinth:au at: 22-Nov-2002 15:11
I presume you have looked at http://www.rebol.com/how-to/encrypt.html
already? Just checking . . .
Regards,
Ashley
[8/8] from: bry:itnisk at: 22-Nov-2002 10:31
>I presume you have looked at http://www.rebol.com/how-to/encrypt.html
>already? Just checking . . .
Actually I did a long time ago and then I forgot about it cause I didn't
care about encrypting anything with Rebol at that point.
Notes
- Quoted lines have been omitted from some messages.
View the message alone to see the lines that have been omitted