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734 results about "Conditional access" patented technology

Conditional access (abbreviated CA) or conditional access system (abbreviated CAS) is the protection of content by requiring certain criteria to be met before granting access to the content. The term is commonly used in relation to digital television systems and to software.

System and method for secure conditional access download and reconfiguration

A method of securely downloading at least one of conditional access software (CAS), Digital Rights Management software (DRMS), Trusted Domain Software (TDS), and Gaming Security Software (GSS) includes presenting a specialized entitlement management message (EMM) to initiate the download to a receiver security device using a supervisory logon key (SLK) split to logon with a second split contained inside the receiver security device, presenting a receiver digitally signed random challenge from the receiver security device to a sender security server to establish authentication of the receiver security device to the sender security server, and signing and returning the receiver random challenge from the sender security server to the receiver security device with a sender random challenge to establish authentication of the sender security server to the receiver security device.
Owner:COMCAST CABLE COMM LLC

Fast authentication and access control system for mobile networking

A fast authentication and access control method of authenticating a network access device to a communications network having an access point communicating with a remote authentication (home AAA) server for the network access device. The method includes the step of receiving an access request having an authentication credential from the network access device at the access point. The authentication credential includes a security certificate having a public key for the network access device and an expiration time. The security certificate is signed with a private key for the remote authentication server. The access point locally validates the authentication credential by accessing the public key of the remote authentication server from a local database, and checking the signature and expiration time of the security certificate. If the authentication credential is validated at the access point, the access point grants the network access device conditional access to the network by sending an access granted message to the network access device. The access granted message includes a session key encrypted with a public key for the network access device. The session key is stored in a database associated with the access point. The access point contacts the remote authentication server to check a revocation status of the security certificate for the network access device. If the access point receives a message from the remote authentication server that the authentication credential for the network access device has been revoked, it suspends network access for the network access device.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO

Conditional access method and device

PCT No. PCT / FR96 / 01269 Sec. 371 Date Feb. 20, 1998 Sec. 102(e) Date Feb. 20, 1998 PCT Filed Aug. 8, 1996 PCT Pub. No. WO97 / 07448 PCT Pub. Date Feb. 27, 1997A conditional access device for use in connection with a host electronic equipment. The device includes a pointer peripheral containing one or more integrated circuit card coupler units. In addition, it also includes a device for acquiring personal information about a user. The personal information is locally compared with information stored in the integrated circuit card without passing through the host equipment.
Owner:SIRBU CORNEL

Fast authentication and access control method for mobile networking

A fast authentication and access control method of authenticating a network access device to a communications network having an access point communicating with a remote authentication (home AAA) server for the network access device. The method includes the step of receiving an access request having an authentication credential from the network access device at the access point. The authentication credential includes a security certificate having a public key for the network access device and an expiration time. The security certificate is signed with a private key for the remote authentication server. The access point locally validates the authentication credential by accessing the public key of the remote authentication server from a local database, and checking the signature and expiration time of the security certificate. If the authentication credential is validated at the access point, the access point grants the network access device conditional access to the network by sending an access granted message to the network access device. The access granted message includes a session key encrypted with a public key for the network access device. The session key is stored in a database associated with the access point. The access point contacts the remote authentication server to check a revocation status of the security certificate for the network access device. If the access point receives a message from the remote authentication server that the authentication credential for the network access device has been revoked, it suspends network access for the network access device.
Owner:AMERICAN TELEPHONE & TELEGRAPH CO

Data transport to mobile devices using a radio broadcast data channel

The present invention relates to method and system for providing data services to mobile device (25) via a digital radio broadcast channel, wherein data is encrypted and forwarded to a digital radio broadcast domain based on a conditional access scheme. The additional access scheme is based on existing concepts of SIM / IMSI definition and algorithms. The invention enables initial message coverage for developing countries and extends rural message coverage for huge area countries, where little mobile coverage is provided.
Owner:NOKIA SOLUTIONS & NETWORKS OY

Method and system for encryption/decryption of scalable video bitstream for conditional access control based on multidimensional scalability in scalable video coding

Disclosed is a system and method for encryption of a scalable video coding (SVC) bitstream, which is the next-generation coding technology. The encryption method encrypts Nation Adaptation Layer (NAL) data identified according to multidimensional scalability for space, time, and quality with respect to a bitstream created after an SVC encoding, thereby providing a multidimensional scalability function for space, time, and quality even after the encryption, so that the scalability is also maintained even in a bitstream extraction process after the encryption. According to such a scalable encryption method, a specific portion of an encrypted bitstream is removed in a bitstream extraction process, and user access to the bitstream is limited based on a combination of keys for accessing a specific scalability. Therefore, it is possible to protect scalable video content and to access the video content based on scalabilities.
Owner:SAMSUNG ELECTRONICS CO LTD +1

Super encrypted storage and retrieval of media programs in a hard-paired receiver and storage device

A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. The apparatus comprises a tuner, for receiving a data stream comprising encrypted access control information and the program material encrypted according to a first encryption key, the access control information including the first encryption key; a first encryption module, communicatively coupled to the tuner and communicatively coupleable to a media storage device, for further encrypting the encrypted program material according to a second encryption key and for encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; a first decryption module communicatively coupleable to the media storage device, for decrypting the fourth encryption key retrieved from the media storage device using the third encryption key to produce the second encryption key, and for decrypting the further encrypted program material retrieved from the media program device to produce the encrypted program material; a conditional access module communicatively coupled to the first decryption module, for decrypting the encrypted access control information to produce the first encryption key; and a second decryption module, for decrypting the program material using the first encryption key.
Owner:DIRECTV LLC
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