Hisilicon Technologies Co., Ltd.

Beijing Novel-super Digital Tv Technology Co., Ltd.

Academy of Broadcasting Science, Nrta

Sumavision Technologies Co., Ltd

Academy of Broadcasting Science, National Radio and Television Administration

Zhonghua Fang

Lei Wang

Qiang Wang

Peng Chen

Lei Zhang

Di Wu

Wei Xie

Qing Yang

Jinglei Liu

Zhifan Sheng

Bin Xiong

Xiaoxia Guo

Haifeng Yan

Peiyu Guo

Lizheng Zheng

Longhui Jin

Xuebing Tian

Provided is a method for protecting an encrypted control word. The method includes: receiving a hardware security module entitlement management message and an encrypted control word transmitted from a main chip, where the hardware security module entitlement management message includes a key for decrypting the encrypted control word; decrypting, based on the hardware security module entitlement management message and a hardware security module root key stored in the hardware security module, the encrypted control word to obtain a control word; reencrypting the control word based on a re-encryption key stored in the hardware security module to obtain a reencrypted control word; and transmitting the reencrypted control word to the main chip, so that the main chip decrypts, based on a main chip entitlement management message transmitted from the front end, the reencrypted control word to obtain the control word.

Method for protecting encrypted control word, hardware security module, main chip and terminal

Method for establishing a trust chain, comprising: requesting a third CA for a third key pair and a third certificate, writing a private key of the third key pair and the third certificate into a security storage area, the third certificate comprising model information of the smart television (SMTV) terminal and information of a public key of the third key pair. The SMTV terminal check its possession of a fourth certificate on every start, generate a unique fourth key pair in absence of a fourth certificate, submit online a public key of the fourth key pair and a unique identification of each SMTV terminal to a fourth CA to request for a fourth certificate, and send along the third certificate and a signature signed on the request with the private key of the third key pair; write the fourth certificate into the security storage area upon receiving the fourth certificate.

Smart television terminal and method for establishing a trust chain therefor

Growing community of inventors

Guangdong, China

Zhonghua Fang