"The text document can be rewritten in encoded/compressed fashion this way, by mapping words to codes, then decoded at a later time using a persistent Perl SDBM database tied hash table holding the word-to-code mappings for a particular text document."

It's a hash of word to code mappings, right?

$hash{$word} = $code

You put in one key, you get one value. One to one. You suggest there are many ways to accomplish this mapping, and perhaps you are thinking of using more than one of your codes to correspond to one word:

$hash{$code1} = $word; $hash{$code2} = $word;

This means encoding will require scanning the entire hash value list and then picking at random one of the possible code keys. It would work, of course; it just looks IMHO kind of clunky. You could make it as difficult to break as you needed, but in the end it would always be breakable.

Since you already have in place a secure method for exchanging your database files, why not exchange random pads instead?

Dum Spiro Spero

In reply to Re^3: Non-Formula based Text Encoding - with Compression by GotToBTru
in thread Non-Formula based Text Encoding - with Compression by locked_user erichansen1836

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