Re: Odd behavior of CryptoSMS; was: Re: My my, how time flies ...... it's been about "1 hour"

Bryan Olson wrote:
> Crypto@S.M.S wrote:
>
> > Joseph Ashwood made that claim, as the basis for his belief that
> > CryptoSMS encrypted SMS messages could be "cracked" in under an
> > hour:
> >
> > Assuming a common passphrase length of around 20 characters, and
> > assuming it is English, this will have 20-30 bits of entropy, MD5
> > will be enough to uniquely identify each of these, and MD5 can be
> > effectively reversed under these circumstances in under 1 hour.
> > This will yield the entire original passphrase, leading
> > immediately to a complete compromise. So 1 hour.
> >
> > <dJ5ue.882$N22.328@newssvr21.news.prodigy.com>
> > "Joseph Ashwood"
> > <ashwood@msn.com> Note the statement, "MD5 can be effectively reversed in
> > under 1
> > hour".
>
> In particular, note that the statement doesn't appear in the
> quote of Joseph Ashwood. What Ashwood wrote was, "MD5 can be
> effectively reversed under these circumstances in under 1 hour."
>
> Is it a reading problem? Mr. SMS seems to be an English-speaker.
> Is it a lie? He provides the refutation himself, so there's no
> serious intent to deceive. It's just weird.

So can MD5 be "effectively reversed" "in under 1 hour" or not?
Received on Thu Sep 29 21:52:32 2005