METHOD FOR OPERATING A CONDITIONAL ACCESS SYSTEM FOR BROADCAST APPLICATIONS
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
N/A
app pub date -
Sep 29, 2015
filing date -
Oct 18, 1999
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In a method for operating a conditional access system for broadcast applications, which conditional access system comprising a number of subscribers, each subscriber having a terminal including a conditional access module (11) and a secure device (12) for storing entitlements, each entitlement indicating a service for which the subscriber receiving the entitlement is entitled to watch, entitlement management messages (EMM's) are sent to a secure device or group of secure devices. These EMM's each provide an entitlement and a corresponding expiry date, wherein the entitlements are refreshed periodically in accordance with their expiry dates by sending EMM's updating the expiry dates. Further, a set of extension entitlement management messages (extension EMM's) is sent to all secure devices, each message indicating that all entitlements having an expiry date within a predetermined first period are extended with a predetermined second period, wherein the EMM's updating the expiry dates are sent after the extension EMM's.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully