Firewall Wizards mailing list archives
Re: R: strong encryption for Europeans
From: Andreas Siegert <afx () ibm de>
Date: Tue, 25 Nov 1997 08:50:12 +0100
If keys are changed often enough, I think 56 bits is still pretty much ok for most uses. It depends very much on the lifetime of the data transfered versus the time needed to crack the key. If the key is changed every 15 minutes (and I assume a much stronger protection on the key exchange), then the attacker not only has to deal with finding the key, but also with finding the window in which the data he is interested in was transferred. On the other hand, has anyone used the ssh VPNs yet? cheers afx Quoting Franco RUGGIERI (fruggieri () selfin net):
Recently (June and October this year), attacks have been successfully accomplished against DES and RC5 56 bit, by a huge number of computers coordinated via Internet. Since participation in such effort was voluntary, I wouldn't define such coordination as *strict*. Thus, we can assume that a well determined organization would break codes based on keys up to 56 bit in a reasonable amount of time. Therefore I wouldn't recommend VPNs based on such systems (RCx, DES and the likes with *short*keys), unless for what I would dub *minor areas* and for not long lasting applications. This, of course, IMHO. I would appreciate comments (not flames!) on this viewpoint of mine.
-- Andreas Siegert afx () ibm de / afx () barolo munich de ibm com / AFX at IPNET PGP Key:http://www.muc.de/~afx/pubkey.asc, KeyId AB26FD05
Current thread:
- R: strong encryption for Europeans Franco RUGGIERI (Nov 24)
- Re: R: strong encryption for Europeans Andreas Siegert (Nov 25)
- Re: R: strong encryption for Europeans Adam Shostack (Nov 25)
- Re: R: strong encryption for Europeans Perry E. Metzger (Nov 25)
- Re: R: strong encryption for Europeans Adam Shostack (Nov 25)
- Re: R: strong encryption for Europeans Adam Shostack (Nov 25)
- Re: R: strong encryption for Europeans Martin W Freiss (Nov 25)
- Re: R: strong encryption for Europeans Andreas Siegert (Nov 25)
- Re: R: strong encryption for Europeans Arjo Mukherjee (Nov 25)
- Re: R: strong encryption for Europeans Bennett Todd (Nov 25)
- Re: R: strong encryption for Europeans Ted Doty (Nov 25)
- <Possible follow-ups>
- Re: R: strong encryption for Europeans Chris Lonvick (Nov 24)
- Re: R: strong encryption for Europeans lum (Nov 25)
- Re: R: strong encryption for Europeans Bennett Todd (Nov 25)
- Re: R: strong encryption for Europeans lum (Nov 25)