Comments on PGP5.0 OCR (was Re: fyi, pgp source now available , internationally)

Adam Back aba at
Mon Aug 11 08:19:00 PDT 1997

Mark Grant <mark at> writes:
> I just wanted to make a few comments on the proofreading, in case anyone
> feels like releasing software in a similar manner in future:
> [...] the OCR-ed pages at HIP included a per-line
> checksum. This was good... but... it also checksummed the whitespace. 
> This wasn't a problem in theory, because tabs were indicated by a special
> character. However, most lines had both tabs *and* spaces and there was no
> way to see where the spaces were because they were overrriden by the tab
> (e.g. "mov<sp><tab>ax,23<sp><sp><tab><sp><tab>; Stuff"). 

How about a book full of 2D barcodes?  

As a plus perhaps the book would be more compact, as you could gzip it
first -- the full source tree looks to be over a foot of doublesided

Have *you* exported RSA today? -->

print pack"C*",split/\D+/,`echo "16iII*o\U@{$/=$z;[(pop,pop,unpack"H*",<>

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