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Renguard obtains serial? [message #82783]

Fri, 23 April 2004 17:09

Blazer
Messages: 3322
Registered: February 2003
Location: Phoenix, AZ

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Crimson

Another example... you could have a 5.6 MB mp3 of some song you like. It may hash to something like "9b773ef3". How can you POSSIBLY reverse this short string of letters to a 5.6 MB file? It's used for comparison. In a perfect world, if your favorite band had two versions of a song and you had one, you could use this hash to compare whether the version you're going to download is the same or a different mix because the hash won't match.

Heh slightly OT but that is exactly the method that Kazaa, WinMX, etc use to tell if a file is the exact same as the one you selected to download. Thats how it keeps from downloading pieces of a song that might have the same filename & filesize but is actually different contents. I think the main point here is that a hash is just a "fingerprint" of a file or piece of data, its not an encrypted form of the data and thus cannot be reversed back to the origional.

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[Message index]

		Renguard obtains serial? By: sterps on Fri, 23 April 2004 05:46
		Renguard obtains serial? By: Neo on Fri, 23 April 2004 05:54
		Re: Renguard obtains serial? By: dommafia on Fri, 23 April 2004 07:54
		Renguard obtains serial? By: jonwil on Fri, 23 April 2004 08:14
		Renguard obtains serial? By: warranto on Fri, 23 April 2004 09:34
		Renguard obtains serial? By: Crimson on Fri, 23 April 2004 11:57
		Renguard obtains serial? By: Blazer on Fri, 23 April 2004 17:09
		lol By: DOD-KRONIC KILLER on Fri, 23 April 2004 23:01
		? By: DOD-KRONIC KILLER on Fri, 23 April 2004 23:04
		Re: ? By: cokemaster on Sat, 24 April 2004 04:38
		Renguard obtains serial? By: sterps on Mon, 26 April 2004 06:14
		Renguard obtains serial? By: Crimson on Mon, 26 April 2004 11:45
		Renguard obtains serial? By: dead6re on Mon, 26 April 2004 12:49
		Renguard obtains serial? By: sterps on Mon, 26 April 2004 17:39
		Re: Renguard obtains serial? By: Majiin Vegeta on Mon, 26 April 2004 19:03

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