Re: What are the chances of this encrytion being broken?

On 24/03/2025 21:33, hal@invalid.com wrote:
<snip>

Do not these crypto "experts"

Most active sci.crypt subscribers do not claim to be experts.

realize how childish and ridiculous it is
to keep bringing up this rubber hose crap?

It was a minor point made en passant, so why dwell on it?

And - I don't think - despite ignoramus that I am - that the encryption
I posted can be broken.

Then you're safe. Well done you.

There's no sign at all of which program
encrypted it. Be it AES or not,

It's not. How do I know? Well, take a look at the histogram:
Code  49 ( 1)     19 (  2.70%)
Code  88 ( X)     18 (  2.55%)
Code 100 ( d)     16 (  2.27%)
Code 105 ( i)     16 (  2.27%)
Code  69 ( E)     15 (  2.13%)
Code  70 ( F)     15 (  2.13%)
Code  82 ( R)     15 (  2.13%)
Code  99 ( c)     15 (  2.13%)
Code 108 ( l)     15 (  2.13%)
Code 111 ( o)     15 (  2.13%)
For a flat ciphertext we'd expect to see each byte value 2-3 times, but in your ciphertext 3/4 of the byte values don't appear /at all/.
I'd be prepared to hazard a guess that the plaintext uses 64 (or possibly 65) distinct characters.

how in the hell would any "expert" even
start anywhere at all.

Yeah, experts don't know diddly squat. The Enigma break is just government propaganda, and Project Venona is a myth. Your expert encryption will obviously defeat all comers.

And as far as junk programs go, which still do encrypt/decrypt properly,
change/delete some matter from the encrypted file, matter which one can
replace for proper decryption, and tell me how in the hell would any
expert have a clue what was before them?

Well, clearly they can't, because they're not as smart as you.

There is too much pedantic display of an uncertain subject in this
group.

It's not quite so uncertain as you might think. But what would I know about it? You're the expert, right?

No, I ain't no crypto expert.

Your modesty is noted. Nevertheless, you have designed an unbreakable cryptosystem. Well done you.

I don't have the slightest clue about the
subject

Is that so? And yet here you are, proclaiming that you've got an unbreakable cryptosystem. Why not send your CV to GCHQ or NSA? I bet they're desperate to get you on board.

except that I know commonsense usually works, especially against
such stultification regarding proprietary or "non vetted" crypto.
 And - I am not speaking of crypto for mass use. Only for personal use,
wherein one *can* make it useful and secure.

If it's useful and secure, why /not/ make it available for mass use?

 But, like I said, what the hell do I know?

Bugger all, by the look of it.
Fortunately for you, it doesn't matter, because only your kid sister gives a damn about your secrets. And yes, your cryptosystem is probably strong enough to stop your kid sister from reading your shit.
--
Richard Heathfield
Email: rjh at cpax dot org dot uk
"Usenet is a strange place" - dmr 29 July 1999
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