Re: xorpng

Liste des GroupesRevenir à s crypt 
Sujet : Re: xorpng
De : pollux (at) *nospam* tilde.club (Stefan Claas)
Groupes : sci.crypt
Date : 05. Jan 2025, 10:40:58
Autres entêtes
Organisation : To protect and to server
Message-ID : <vldk3q$psnq$1@paganini.bofh.team>
References : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
User-Agent : flnews/1.3.0pre29 (for GNU/Linux)
Stefan Claas wrote:
Rich wrote:
Stefan Claas <pollux@tilde.club> wrote:
Rich wrote:
 
If instead you mean some kind of "special, PNG aware, encryptor that
only encrypted the bitmap data of a PNG", but left the file as
otherwise a proper PNG image structure, then that is slightly tricky
(and an algorithm that is only useful for PNG's alone).
 
Yes, this is what I mean.
 
Which brings up the question of: why?
 
Why go to the trouble to create an encryptor that is specalized for
just encrypting the internal bitmap data within a PNG, leaving the rest
as a PNG file, when a generic "byte stream" encryptor will encrypt the
entire PNG with no extra effort?
 
To make more content as allowed postable on social media, like X.

I.e, first you put data with file2png in a .png and then encrypt it
to finally post it. I can do this now with my xorpic program, but
I thought a solution with AES-GCM or XChaCha20+ploy1305 is better.

--
Regards
Stefan

Date Sujet#  Auteur
1 Jan 25 * Ternary Encoding :-)99Stefan Claas
1 Jan 25 +* Re: Ternary Encoding :-)25Stefan Claas
1 Jan 25 i`* Re: Ternary Encoding :-)24Rich
1 Jan 25 i +* Re: Ternary Encoding :-)6Stefan Claas
1 Jan 25 i i+* Re: Ternary Encoding :-)4Stefan Claas
1 Jan 25 i ii+- Re: Ternary Encoding :-)1Stefan Claas
1 Jan 25 i ii`* Re: Ternary Encoding :-)2Rich
11 Jan 25 i ii `- Re: Ternary Encoding :-)1Chris M. Thomasson
1 Jan 25 i i`- Re: Ternary Encoding :-)1Rich
1 Jan 25 i `* Re: Ternary Encoding :-)17Stefan Claas
1 Jan 25 i  `* Re: Ternary Encoding :-)16Rich
2 Jan 25 i   `* Re: Ternary Encoding :-)15Stefan Claas
2 Jan 25 i    `* Re: Ternary Encoding :-)14Rich
2 Jan 25 i     `* Re: Ternary Encoding :-)13Stefan Claas
2 Jan 25 i      +* Re: Ternary Encoding :-)4Stefan Claas
2 Jan 25 i      i`* Re: Ternary Encoding :-)3Rich
3 Jan 25 i      i `* Re: Ternary Encoding :-)2Stefan Claas
3 Jan 25 i      i  `- Re: Ternary Encoding :-)1Rich
2 Jan 25 i      `* Re: Ternary Encoding :-)8Rich
3 Jan 25 i       `* Re: Ternary Encoding :-)7Stefan Claas
3 Jan 25 i        `* Re: Ternary Encoding :-)6Stefan Claas
3 Jan 25 i         +- Re: Ternary Encoding :-)1Rich
3 Jan 25 i         `* Re: Ternary Encoding :-)4Rich
3 Jan 25 i          +- Re: Ternary Encoding :-)1Stefan Claas
8 Jan 25 i          `* Re: Ternary Encoding :-)2Chax Plore
8 Jan 25 i           `- Re: Ternary Encoding :-)1Rich
3 Jan 25 `* Re: Ternary Encoding :-)73Chris M. Thomasson
3 Jan 25  `* Re: Ternary Encoding :-)72Stefan Claas
3 Jan 25   `* Re: Ternary Encoding :-)71Chris M. Thomasson
4 Jan 25    `* xorpng (was: Ternary Encoding :-))70Stefan Claas
4 Jan 25     +- Re: xorpng1Stefan Claas
4 Jan 25     `* Re: xorpng68Chris M. Thomasson
4 Jan 25      `* Re: xorpng67Stefan Claas
4 Jan 25       `* Re: xorpng66Chris M. Thomasson
4 Jan 25        `* Re: xorpng65Chris M. Thomasson
4 Jan 25         `* Re: xorpng64Stefan Claas
4 Jan 25          `* Re: xorpng63Chris M. Thomasson
4 Jan 25           `* Re: xorpng62Stefan Claas
4 Jan 25            +* Re: xorpng53Chris M. Thomasson
5 Jan 25            i`* Re: xorpng52Stefan Claas
5 Jan 25            i `* Re: xorpng51Rich
5 Jan 25            i  `* Re: xorpng50Stefan Claas
5 Jan 25            i   +* Re: xorpng8Chris M. Thomasson
5 Jan 25            i   i`* Re: xorpng7Stefan Claas
5 Jan 25            i   i `* Re: xorpng6Chris M. Thomasson
5 Jan 25            i   i  +- Re: xorpng1Chris M. Thomasson
5 Jan 25            i   i  `* Re: xorpng4Stefan Claas
5 Jan 25            i   i   `* Re: xorpng3Chris M. Thomasson
5 Jan 25            i   i    `* Re: xorpng2Stefan Claas
5 Jan 25            i   i     `- Re: xorpng1Chris M. Thomasson
5 Jan 25            i   `* Re: xorpng41Rich
5 Jan 25            i    +* Re: xorpng36Stefan Claas
5 Jan 25            i    i+* Re: xorpng27Stefan Claas
5 Jan 25            i    ii`* Re: xorpng26Rich
5 Jan 25            i    ii `* Re: xorpng25Stefan Claas
5 Jan 25            i    ii  `* Re: xorpng24Rich
5 Jan 25            i    ii   `* Re: xorpng23Stefan Claas
6 Jan 25            i    ii    +* Re: xorpng21Stefan Claas
6 Jan 25            i    ii    i+* Re: xorpng2Chris M. Thomasson
6 Jan 25            i    ii    ii`- Re: xorpng1Chris M. Thomasson
6 Jan 25            i    ii    i+- Re: xorpng1Chris M. Thomasson
6 Jan 25            i    ii    i`* Re: xorpng17Rich
6 Jan 25            i    ii    i `* Re: xorpng16Stefan Claas
6 Jan 25            i    ii    i  +* Re: xorpng5Stefan Claas
6 Jan 25            i    ii    i  i+* Re: xorpng3Stefan Claas
7 Jan 25            i    ii    i  ii`* Re: xorpng2Jan Panteltje
7 Jan 25            i    ii    i  ii `- Re: xorpng1Stefan Claas
7 Jan 25            i    ii    i  i`- Re: xorpng1Rich
6 Jan 25            i    ii    i  `* Re: xorpng10Rich
7 Jan 25            i    ii    i   `* Re: xorpng9Stefan Claas
7 Jan 25            i    ii    i    `* Re: xorpng8Stefan Claas
11 Jan 25            i    ii    i     `* Re: xorpng7Stefan Claas
11 Jan 25            i    ii    i      `* Re: xorpng6Stefan Claas
11 Jan 25            i    ii    i       `* Re: xorpng5Chris M. Thomasson
11 Jan 25            i    ii    i        +- Re: xorpng1Chris M. Thomasson
11 Jan 25            i    ii    i        `* Re: xorpng3Stefan Claas
12 Jan 25            i    ii    i         `* Re: xorpng2Chris M. Thomasson
5 Mar 25            i    ii    i          `- Re: xorpng1Stefan Claas
6 Jan 25            i    ii    `- Re: xorpng1Rich
5 Jan 25            i    i+- Re: xorpng1Rich
5 Jan 25            i    i`* Re: xorpng7Chris M. Thomasson
5 Jan 25            i    i +* Re: xorpng5Chris M. Thomasson
5 Jan 25            i    i i`* Re: xorpng4Stefan Claas
5 Jan 25            i    i i +* Re: xorpng2Chris M. Thomasson
6 Jan 25            i    i i i`- Re: xorpng1Rich
5 Jan 25            i    i i `- Re: xorpng1Chris M. Thomasson
6 Jan 25            i    i `- Re: xorpng1Rich
10 Feb 25            i    `* Re: xorpng4Richard Heathfield
10 Feb 25            i     +* Re: xorpng2Rich
10 Feb 25            i     i`- Re: xorpng1Richard Heathfield
10 Feb 25            i     `- Re: xorpng1Jan Panteltje
4 Jan 25            `* Re: xorpng8Chris M. Thomasson
4 Jan 25             +* Re: xorpng2Chris M. Thomasson
5 Jan 25             i`- Re: xorpng1Stefan Claas
5 Jan 25             `* Re: xorpng5Stefan Claas
5 Jan 25              `* Re: xorpng4Stefan Claas
5 Jan 25               `* Re: xorpng3Chris M. Thomasson
5 Jan 25                `* Re: xorpng2Stefan Claas
5 Jan 25                 `- Re: xorpng1Chris M. Thomasson

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