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Fri, 20 Jul 2001 08:15:11 -0400 |
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On Fri, 20 Jul 2001, Fergal Suipeil wrote:
> Hi,
>
> On Thu, 19 Jul 2001, Christopher Ferraro wrote:
>
> > Can you read these .jobh messages with notepad or any other application ?
> >
> > They seem to be encrypted someway.
>
> It's a form of weak proprietary encryption called EBCDIC. It was in
> widespread use in the latter half of the last century, but fell into
> disuse as stronger forms of encryption became available. It's based
> roughly on the idea of exchanging sets of characters. First you swap
> the numbers with the letters, then you swap uppercase and lowercase,
> and finally to confuse people who think they've decoded the letters
> you put groups of punctuation in at random. People who know what I'm
> talking about will also know that I'm joking (mostly :-)
Huh? EBCDIC is not an encryption scheme. Its simply the way IBM
mainframes represent data internally. EBCDIC on IBM mainframes is
analogous to ASCII on personal computers.
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