Method and device for authorising conditional access

A technology for conditional access and authorization devices, applied in user identity/authority verification, electrical components, digital computer components, etc., can solve problems such as shutdown
CN101047830BInactive Publication Date: 2012-07-18IRDETO ACCESS
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
IRDETO ACCESS
Publication Date
2012-07-18
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

A method of authorising conditional access to an encrypted digital data product, includes storing at least one set of entitlements in a secure device, each entitlement including a product identifier and expiry information, receiving entitlement control messages from a decoder system including a device for decrypting encrypted digital data products using control words, each entitlement control message including a product identifier, and in a first mode, returning at least one control word in response to an entitlement control message including a product identifier if the product identifier corresponds to a product identifier in a stored entitlement including expiry information indicating the entitlement to be valid, and, in a second mode, progressively adjusting a counter to a pre-determined value and returning at least one control word in response also to entitlement control messages including a product identifier if the product identifier corresponds to a product identifier in a stored entitlement including expiry information indicating expiry of the entitlement and if the counter is at a value between an initial value and the pre-determined value. The counter is set to an initial value to commence operation in the second mode upon receiving an entitlement control message including a product identifier corresponding to a product identifier in a stored entitlement that includes expiry information indicating expiry of the entitlement.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a method for authorizing conditional access to encrypted digital data products, comprising:

[0002] storing at least one set of entitlements in the secure device, each entitlement including a product identification number and expiration information,

[0003] receiving entitlement control messages from a decoder system comprising means for decrypting an encrypted digital data product using the control word, each entitlement control message including a product identification number, and

[0004] In a first mode, in response to an entitlement control message including a product identification number, if the product identification number corresponds to a product identification number in a stored entitlement including expiration information indicating that the entitlement is valid, then at least one control word is returned, and

[0005] In the second mode, also in response to an entitlement control message including a produ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More