SYSTEM FOR TRACKING END-USER ELECTRONIC CONTENT USAGE
摘要
A system for tracking usage of digital content on user devices. Electronic stores coupled to a network sell licenses to play digital content data to users. A system for securely providing data, the system being capable of receiving both data encrypted with a first encryption key and a encrypted first encryption key.
申请公布号
CA2338414(A1)
申请公布日期
2000.02.24
申请号
CA19992338414
申请日期
1999.08.12
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
DORAK, JOHN, JR.;DOWNS, EDGAR;GRUSE, GEORGE GREGORY;MILSTED, KENNETH;LEHMAN, CHRISTOPHER;LOTSPIECH, JEFFREY;MEDINA, CESAR;HURTADO, MARCO