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#1
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Hash Totals
Can I get a hash total on a document? A Hash total would assign a unique
number value to each character and then gives you the total of all those numbers. If anything changes, anything, then there is a different hash total. Thus the number of characters and spaces and words etc., might be the same, but a hash total would be different, thus nailing any changes down. I guess you could go thru and replace, but surely there is someone out here that assigns a value for each character and space and then totals. I am not confident in Word. I believe things are changed from opening to opening and I am trying to guard the document to be absolutely certain that the document is exactly the same....exactly |
#2
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Hash Totals
Hi bretsharon,
Hash totals are only a weak form of protection - it's quite easy to modify a document in such a way as to keep the same has total. For eample: The quick brown fox jumps over the lazy dog. and: The dray jump quiz governs the fox lock bow. would generate the same hash total. If you need to ensure someone doesn't change a document you've given them, supply it as a protected PDF. -- Cheers macropod [Microsoft MVP - Word] "bretsharon" wrote in message ... Can I get a hash total on a document? A Hash total would assign a unique number value to each character and then gives you the total of all those numbers. If anything changes, anything, then there is a different hash total. Thus the number of characters and spaces and words etc., might be the same, but a hash total would be different, thus nailing any changes down. I guess you could go thru and replace, but surely there is someone out here that assigns a value for each character and space and then totals. I am not confident in Word. I believe things are changed from opening to opening and I am trying to guard the document to be absolutely certain that the document is exactly the same....exactly |
#3
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Hash Totals
Even PDF protection can be worked around. Ultimately if you allow someone to
see a document then that document can be copied and the copy edited to replace the original. There is not now and never will be a way around that - people have been copying documents since writing became a form of communication. The best protection for documents is to release only paper copies marked with a pre-printed text watermark that repeats over the whole background, making it difficult to use OCR software, and to sign the document with a pen, which is more difficult to forge. That will not stop a determined forger, but it might make it not worth his while. -- Graham Mayor - Word MVP My web site www.gmayor.com Word MVP web site http://word.mvps.org "macropod" wrote in message ... Hi bretsharon, Hash totals are only a weak form of protection - it's quite easy to modify a document in such a way as to keep the same has total. For eample: The quick brown fox jumps over the lazy dog. and: The dray jump quiz governs the fox lock bow. would generate the same hash total. If you need to ensure someone doesn't change a document you've given them, supply it as a protected PDF. -- Cheers macropod [Microsoft MVP - Word] "bretsharon" wrote in message ... Can I get a hash total on a document? A Hash total would assign a unique number value to each character and then gives you the total of all those numbers. If anything changes, anything, then there is a different hash total. Thus the number of characters and spaces and words etc., might be the same, but a hash total would be different, thus nailing any changes down. I guess you could go thru and replace, but surely there is someone out here that assigns a value for each character and space and then totals. I am not confident in Word. I believe things are changed from opening to opening and I am trying to guard the document to be absolutely certain that the document is exactly the same....exactly |
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