• Subject: RE: 2 interesting projects...
  • From: Leif Svalgaard <l.svalgaard@xxxxxxxxxxxxx>
  • Date: Tue, 1 Feb 2000 17:40:35 -0600

What I meant was that twofish already exists as C-code.
Gene did it in MI because the swap would be too
cumbersome (slow?) in C. Correct Gene?
If so, similar considerations may apply to PGP...


> -----Original Message-----
> From: dhandy@isgroup.net [SMTP:dhandy@isgroup.net]
> Sent: Tuesday, February 01, 2000 5:22 PM
> To:   MI400@midrange.com
> Subject:      Re: 2 interesting projects...
> 
> Lief,
> 
> >but isn't that true of the twofish algorithm too?
> >So why did Gene make an MI version?
> 
> No; TwoFish has been granted free use rights for *Public.
> 
> One reason Gene needed an MI version is the way the TwoFish algorithm
> reuses the results of integer operations as part of the encryption
> process.  When used on a single platform, the algorithm would be
> symmetrical, ie would decrypt correctly.  But the Big-Endian vs
> Little-Endian differences in integer storage formats in the 400 vs
> Intel platforms means the files would not be cross-platform
> compatible.  So Gene's MI program does a swap on every 4 bytes to
> mimic the Intel format to get cross-platform support.
> 
> Doug
> +---
> | This is the MI Programmers Mailing List!
> | To submit a new message, send your mail to MI400@midrange.com.
> | To subscribe to this list send email to MI400-SUB@midrange.com.
> | To unsubscribe from this list send email to MI400-UNSUB@midrange.com.
> | Questions should be directed to the list owner/operator:
> dr2@cssas400.com
> +---
+---
| This is the MI Programmers Mailing List!
| To submit a new message, send your mail to MI400@midrange.com.
| To subscribe to this list send email to MI400-SUB@midrange.com.
| To unsubscribe from this list send email to MI400-UNSUB@midrange.com.
| Questions should be directed to the list owner/operator: dr2@cssas400.com
+---

As an Amazon Associate we earn from qualifying purchases.

This thread ...


Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2022 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.