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Groups > comp.programming > #5538
| From | Richard Heathfield <rjh@cpax.org.uk> |
|---|---|
| Newsgroups | comp.programming |
| Subject | Re: What happened to radtard? |
| Date | 2015-07-31 12:24 +0100 |
| Organization | go, ion artisan! |
| Message-ID | <mpflq9$s7b$1@dont-email.me> (permalink) |
| References | <4758eb21-711c-4701-9cbc-d0c4f9be0dee@googlegroups.com> <mpfg4k$8e6$1@dont-email.me> <63eea4a6-2bd2-48f1-879b-19ac5c063ca9@googlegroups.com> |
On 31/07/15 12:07, Paul N wrote: <snip> > If the data were truly random, you'd expect about > the same amount of each byte, so if there is a big > difference between the most and least fequent values > that would sugest that there's *something* going on. That's right. Thing is, "about the same amount of each byte" is a bit nebulous, isn't it? I'm not quite sure how to express this, but I want to be able to decide, in a binary (yes/no) fashion, whether there's *something* going on, in a programmatic or at least numerical way. How much something does there need to be (how much departure from a flat distribution) before it's *something* rather than just something? > Beyond that, you could compare with the frequencies > of letters, to see if it might be a simple substitution > cypher (each letter replaced with a particular different one). Er, yeah, that's relevant too, I guess, but the day I have trouble cracking a simple substitution cipher is the day I hang up my keyboard. :-) -- Richard Heathfield Email: rjh at cpax dot org dot uk "Usenet is a strange place" - dmr 29 July 1999 Sig line 4 vacant - apply within
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What happened to radtard? Chad <cdalten@gmail.com> - 2015-07-31 02:26 -0700
Re: What happened to radtard? Richard Heathfield <rjh@cpax.org.uk> - 2015-07-31 10:47 +0100
Re: What happened to radtard? Paul N <gw7rib@aol.com> - 2015-07-31 04:07 -0700
Re: What happened to radtard? Richard Heathfield <rjh@cpax.org.uk> - 2015-07-31 12:24 +0100
Re: What happened to radtard? David Brown <david.brown@hesbynett.no> - 2015-08-05 11:08 +0200
Re: What happened to radtard? Walter Banks <walter@bytecraft.com> - 2015-08-12 14:03 -0400
Re: What happened to radtard? Paul N <gw7rib@aol.com> - 2015-08-05 15:29 -0700
Re: What happened to radtard? leif.roar@dimnakorr.com - 2015-08-06 03:31 -0500
Re: What happened to radtard? fir <profesor.fir@gmail.com> - 2015-07-31 08:10 -0700
Re: What happened to radtard? Chad <cdalten@gmail.com> - 2015-07-31 23:05 -0700
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