ARRANGEMENT FOR INDEPENDENTLY REQUESTING A PLAYING AUTHORIZATION FOR A REPRODUCED ENCRYPTED INFORMATION SIGNAL

• US 20010013022A1
• Filed: 07/07/1998
• Published: 08/09/2001
• Est. Priority Date: 07/11/1997
• Status: Active Grant

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: PROIDL, ADOLF
• Granted Patent: US 6,308,269 B2
• Time in Patent Office: Days
• US Class Current: 705/52
• CPC Class Codes: H04N 21/2541 Rights Management protecting software against unauthorised usage in a vending or licensing environment G06F21/10; security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/2543 Billing , e.g. for subscription services payment schemes, architectures or protocols G06Q20/00; e-commerce G06Q30/00; arrangements for billing for the use of broadcast information or broadcast-related information H04H60/21
• CPC Class Codes: H04N 21/4325 by playing back content from the storage medium reproduction of recorded television signals H04N5/76; reproduction of recorded television signals H04N9/79
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/472 End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content end-user interfaces for retrieving video data from a database G06F16/739; network services for supporting unicast streaming H04L65/612
• CPC Class Codes: H04N 21/63345 by transmitting keys key distribution for secret or secure communication H04L9/08; network support of key management H04L63/06
• CPC Class Codes: H04N 21/8355 involving usage data, e.g. number of copies or viewings allowed
• CPC Class Codes: H04N 7/163 by receiver means only
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58

Abstract

An arrangement (1) for verifying a playing authorization for an encrypted information signal (I) reproduced by means of a reproducing device (2, 3) and for supplying a decrypted information signal (I) when a playing authorization is available, comprises verification means (19) for verifying a playing authorization for a reproduced encrypted information signal (I), and comprises decryption means (32) fro decrypting a reproduced encrypted information signal (I) when a playing authorization is available, and comprises interrogation means (43, 35) for independently requesting a playing authorization, which interrogation means include communication means (43) which, in the absence of a playing authorization for a reproduced encrypted information signal (I) are capable of setting up a data link (49, 52, 56, 59) and of supplying playing authorization request information to a playing authorization allocation device (51, 53, 57, 60) via the data link (49, 52, 56, 59) and of receiving a playing authorization for the reproduced encrypted information signal (I) from the playing authorization allocation device (51, 53, 57, 60).

Claims

1. An arrangement (1) for verifying a playing authorization for a reproduced encrypted information signal—

which is reproduced by means of a reproducing device (2, 3) adapted to cooperate with the arrangement (1)—

and for supplying a decrypted information signal when a playing authorization is available, comprising

verification means (19) arranged to receive a reproduced encrypted information signal and adapted to supply key information (S) suitable for correctly decrypting the reproduced encrypted information signal when a playing authorization is available, and decryption means (32) arranged to receive key information (S) and adapted to decrypt the reproduced encrypted information signal when suitable key information (S) is available, characterized in that

the arrangement (1) is equipped with interrogation means (35, 43) for independently requesting a playing authorization.

2. An arrangement (1) as claimed in

claim 1

, characterized in that the interrogation means (35, 43) include communication means (43) which are adapted to set up a data link (49, 52, 56, 59) between the communication means (43) and at least one playing authorization allocation device (51, 53, 57, 60) in the absence of a playing authorization for a reproduced encrypted information signal, and

the communication means (43) are adapted to supply playing authorization request information to the playing authorization allocation device (51, 53, 57, 60) via the data link (49, 52, 56, 59) and to receive a playing authorization for the reproduced encrypted information signal from the playing authorization allocation device (51, 53, 57, 60).

3. An arrangement (1) as claimed in

claim 2

, characterized in that the verification means (19) are adapted to read out and supply enable information which is contained in a reproduced encrypted information signal and which identifies a playing authorization allocation device allowed to allocate a playing authorization for the reproduced encrypted information signal, and the communication means (43) are adapted to supply playing authorization request information to the playing authorization allocation device (51, 53, 57, 60) identified by the enable information.

4. An arrangement (1) as claimed in

claim 3

, characterized in that receiving means (63) have been provided for receiving an encrypted information signal supplied by a broadcasting station (53, 57, 60, 65), the encrypted information signal containing enable information which identifies a playing authorization allocation device (51, 53, 57, 60) allowed to allocate a playing authorization for the encrypted information signal, and

interface means (13) have been provided for supplying an encrypted information signal containing the enable information to a recording and reproducing device (2) adapted to cooperate with the interface means (13) in order to record the encrypted information signal.

5. An arrangement (1) as claimed in

claim 3

, characterized in that the communication means (43) comprise memory means (45) in which connection set-up information from playing authorization allocation device (51, 53, 57, 60) identified by enable information can be stored, and

the communication means (43), in the absence of a playing authorization for a reproduced encrypted information signal containing given enable information, are adapted to set up a data link (49, 52, 56, 59) by means of the connection set-up information stored in the memory means (45) for supplying playing authorization request information to the playing authorization allocation device (51, 53, 57, 60) identified by the given enable information, and to receive a playing authorization for the reproduced encrypted information signal via the data link (49, 52, 56, 59).

6. An arrangement (1) as claimed in

claim 2

, characterized in that the communication means (43) are adapted to supply playing authorization request information identifying the reproduced encrypted information signal to a playing authorization allocation device (51, 53, 57, 60) and to receive key information (S1) from the playing authorization allocation device (51, 53, 57, 60), which key information is dependent on the playing authorization request information.

7. An arrangement (1) as claimed in

claim 2

, characterized in that processing means (35) have been provided for decoding a reproduced non-encrypted information signal, which means also form part of the interrogation means (35, 43), and the processing means (35) are adapted to supply control information (SI) to the communication means (43), which control information is characteristic of an incorrect decryption of a reproduced encrypted information signal owing to the absence of a playing authorization.

8. An arrangement (1) as claimed in

claim 2

, characterized in that the verification means (19) include a key stage (22) which is arranged to receive first key information (S1) received in the communication means (43) from a playing authorization allocation device (51, 53, 57, 60) and to receive second key information (S2) contained in the reproduced encrypted information signal, and

the key stage (22), when a playing authorization is available, is adapted to jointly process the first key information (S1) and the second key information (S2) and to supply composite key information (S) to the decryption means (32), which composite key information is suitable for the correct decryption of the reproduced encrypted information signal.

9. An arrangement (1) as claimed in

claim 1

, characterized in that control means (62) have been provided which are adapted to supply, in the absence of a playing authorization, pause information to the reproducing device (2, 3) via interface means (13) in order to interrupt the reproduction of an encrypted information signal, and the control means (62) are adapted to supply, when subsequently a playing authorization for the encrypted information signal is available, end-of-pause information to the reproducing device (2, 3) via the interface means (13) in order to continue reproduction of the encrypted information signal. (FIG. 1).