US 6,928,442 B2
Enforcement and policing of licensed content using content-based identifiersGeneral
US 6,928,442 B2
Enforcement and policing of licensed content using content-based identifiers
Tech Center:
2100 Computer Architecture and Software
Examiner:
Luke S Wossum
Art Unit:
2167 Data Bases & File Management
Inventors:
David A. Farber; Ronald D. Lachman
Assignee:
Priority:
04/11/95
Filed:
11/15/01
Granted:
08/09/05
Expiration:
04/11/15
Abstract
Data files are distributed across a plurality of computers. The computers may form a network such as a content delivery network (CDN) or a peer-to-peer network. The network may operate as a TCP/IP network such as the Internet. Data files may represent may represent digital messages, images, videos or audio signals. For content—data items or files in the system—a name is obtained (or determined), where the name is based, at least in part, on a given function of the data in a data item or file. The given function may be a message digest or hash function, and it may be MD4, MD5, and SHA. A cony of a requested file is only provided to licensed (or authorized) parties. The system may check one or more computers for unauthorized or unlicensed content. Content is served based on a measure of availability of servers.
Cooperative Patent Classification (CPC)
G06G06F16/164G06FY10S707/99942Y10S