Patent · US Active

Technique for determining usage of encrypted media content

US8842823B2 · kind B2 · utility

0Cited by

2References

15Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Daniel Catrein · Harsewinkel, DE
Markus Kampmann · Aachen, DE
Thomas Rusert · Sollentuna, SE

Key dates

Filing date	Sep 9, 2009
Grant date	Sep 23, 2014
Priority date	—
Expiry date	Sep 9, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2463/101
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A technique for determining usage of encrypted media content is described. A method implementation of this technique comprises the steps of obtaining a short-term key for decrypting the media content, obtaining a long-term key for decrypting the short-term key, decrypting the short-term key based on the long-term key, decrypting the media content based on the decrypted short-term key, and logging a parameter relating to the short-term key as a basis for determining media content usage. The short-term key may be a Traffic Encryption Key, TEK, and the long-term key may be a Service Encryption Key, SEK.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.