[FoRK] PersonalWeb patents "unique" hashes of content
sdw at lig.net
Tue Sep 18 18:41:05 PDT 2012
Content addressable storage == hashtable. Earliest use of a hash
table? 60's at the latest.
Actual CAS granularity hash tables:
> The Stanford Archival Vault  is a prototype archival repository
> intended for digital libraries. The archive consists of a write-once
> log of digital objects (files) and several auxiliary indexes for
> locating objects within the log. Objects are identified by the hash of
> their contents using a cyclic redundancy check (CRC).
 Arturo Crespo and Hector Garcia-Molina. Archival storage for digital
libraries. In Proceedings of the 3rd ACM International Conference on
Digital Libraries, 1998.
This is clearly invalid:
Patent filing / priority date seems to be April 1 (!) 1999.
On 9/18/12 5:46 PM, Ken Meltsner wrote:
> Essentially, the same filing against lots of big companies, including
> Microsoft, Yahoo, and Facebook. And Apple.
> Cause of Action: Filed for the alleged infringement of U.S. Patent No.
> 5,978,791, entitled “Data Processing System Using Substantially Unique
> Identifiers to Identify Data Items, Whereby Data Items Have the Same
> Identifiers;” U.S. Patent No. 6,415,280, entitled “Identifying and
> Requesting Data in Network Using Identifiers Which Are Based On
> Contents of Data;” and U.S. Patent No. 7,802,310, entitled
> “Controlling Access to Data in a Data Processing System.”
> I'm pretty sure at least one member of this list used similar
> techniques a decade ago for content management.
> Ken Meltsner
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