Re: Complex Theoretical One Way Hash Question



Good points one and all.

Wouldn't the sex-cool flavour of the day and popular public opinion
want us to do all this in AJAX? Client-side hash implementation computes
digest from a $url and displays it over top the image in question.

But yes, we still havn't heard from OP.

JLC

Unruh <unruh-spam@xxxxxxxxxxxxxx> wrote:
Since postscript is a turing complete language, couldn't you just make
it calculate the MD5 digest of itself and then print it? It would
essentially be a quine that instead of printing itself printed the MD5
digest of itself. It should be possible in any language that allows
both printing quines and calculating MD5.

That would of course be useless in verifying the photo, since anyone could
change the code in the postscript file to print out whatever they wanted,
including any purported hash.

The OP never did say what he really wanted this for so it is entirely
unclear if any of these ideas would meet his needs. When pressed he refuses
to say what he wants.



Ben


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Relevant Pages

  • Re: Byte to byte compare, duplicate file finder/killer
    ... RFC 1321 - The MD5 Message-Digest Algorithm ... message having a given prespecified target message digest. ... static void Encode PROTO_LIST ... unsigned int i, index, partLen; ...
    (alt.lang.asm)
  • Re: openbgpds not talking each other since 8.2-STABLE upgrade
    ... option on the listening sockets. ... having BGP sessions to an ISP with md5 and a session between themselves without md5. ... tcpdump showed packets with md5 digest fields all zeroes. ...
    (freebsd-net)
  • MD5 Myths
    ... put together a PERL/ CGI web application kind of like a blog type ... did then - MD5 which I leaned on for support has not withstood the ... Ok so I'm deciding whether to put more trust in the MD5 digest to do ... Considering a case of 80 random characters, ...
    (sci.crypt)
  • Re: md5 in C
    ... This code implements the MD5 Algorithm defined in RFC 1321. ... int main ... int FileMd5(char *FileName,md5_byte_t *digest) ...
    (comp.lang.c)
  • Re: MD5 Myths
    ... That's an over-broad indictment of MD5. ... ways to deliberately create collisions; ... found ways to create source strings that will hash to a ... in the MD5 digest to do more and/ or redesign ...
    (sci.crypt)