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.
[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.
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