Re: Impossible compression still not possible. [was RE: Debunking the PGP backdoor myth for good. [was RE: Hypothesis: PGP backdoor (was: A security bug in PGP products?)]]

2006-09-03 Thread John Denker
Dave Korn asked: > Is it *necessarily* the case that /any/ > polynomial of log N /necessarily/ grows slower than N? Yes. Hint: L'Hôpital's rule. > if P(x)==e^(2x) That's not a polynomial. x^Q is a polynomial. Q^x is not. ---

Re: Impossible compression still not possible. [was RE: Debunking the PGP backdoor myth for good. [was RE: Hypothesis: PGP backdoor

2006-08-30 Thread Ondrej Mikle
Dave Korn wrote: Of course, I could point out that there is precisely *1* bit of information in that huge GIF, so even compressing it to 35 bytes isn't a great achievement... it's one of the set of less-common inputs that grow bigger as a compromise so that real pictures, which tend to have at

RE: Impossible compression still not possible. [was RE: Debunking the PGP backdoor myth for good. [was RE: Hypothesis: PGP backdoor (was: A security bug in PGP products?)]]

2006-08-30 Thread Dave Korn
On 28 August 2006 17:12, Ondrej Mikle wrote: > We are both talking about the same thing :-) Oh! > I am not saying there is a finite deterministic algorithm to compress > every string into "small space", there isn't. BTW, thanks for "There > is ***NO*** way round the counting theory." :-) > >

Re: Impossible compression still not possible. [was RE: Debunking the PGP backdoor myth for good. [was RE: Hypothesis: PGP backdoor (was: A security bug in PGP products?)]]

2006-08-30 Thread Ondrej Mikle
We are both talking about the same thing :-) I am not saying there is a finite deterministic algorithm to compress every string into "small space", there isn't. BTW, thanks for "There is ***NO*** way round the counting theory." :-) All I wanted to say is: For a specific structure (e.g. movie, pi

Impossible compression still not possible. [was RE: Debunking the PGP backdoor myth for good. [was RE: Hypothesis: PGP backdoor (was: A security bug in PGP products?)]]

2006-08-30 Thread Dave Korn
On 28 August 2006 15:30, Ondrej Mikle wrote: > Ad. compression algorithm: I conjecture there exists an algorithm (not > necessarily *finite*) that can compress large numbers > (strings/files/...) into "small" space, more precisely, it can > compress number that is N bytes long into O(P(log N)) byt