Also, what about SHA instead of MD5. I understand it's "freer."
At 04:36 PM 3/9/99 -0000, you wrote:
>Folks
>
>Submitting the all the fields in "plaintext", rather than hashing them up on
>the client side gives a lot more flexibility. Don't forget that initially we
>will be querying a database where the initial data will be based on an old
>cut of CDDB, so passing our MD5 hash in will be useless unless we can
>convert it to a CDDB hash
>
>The way I see it, the query could go something like this:
>
>1. The client gets all the relavent information fomr the CD, packages it
>into an object (C struct/XML/whatever) and fires it off to the server.
>
>2. The server performs some form of hash on the object. If anything matches,
>it returns a list of the matching items to the client.
>
>3. If nothing matched, we re-hash the object using the old CDDB hashing
>method, and see if we have any matches from the data loaded from the old cut
>of CDDB. If anything matches, we return it to the user.
>
>4. If we still have nothing, then we have the option of doing some fuzzy
>matching - "SELECT * WHERE LENGTH(track1) is_nearly nospam at track1length" - or
>returning not found to the client.
>
>This would give several advantages.
>
>1. We don't have to convert all the old hashes from the old CDDB cut to the
>new format. They can co-exist side by side.
>3. Fuzzy matching is possible without needing to resbumit the data, wheras
>it's not really doable if we only have an MD5 hash to work with.
>4. KISS!
>
>Bandwidth isn't an issue for passing the object - 1 byte for number of
>tracks, plus 20 words (1 for each track length, in seconds). AFAIK there's
>not much more we can tell about a CD when it's first inserted.
>
>The trick is passing enough data in so we can use our new, all singing all
>dancing hash function if we want to, but if not we can still use the old
>CDDB hashing function.
>
> Cheers... Mike
>
>
>
-----
Jason Dufair
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