International Business Machines Corporation

Hisilicon Technologies Co., Ltd.

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

Academy of Broadcasting Science, Nrta

Sumavision Technologies Co., Ltd

Bin Xiong

Qiang Wang

Ting Chen

Si Bin Fan

Peng Chen

Lei Zhang

Yang Liang

Qin Yue Chen

Wei Xie

Wu Song Fang

Qing Yang

Jinglei Liu

Zhifan Sheng

Xing Xing Jing

Da Long Wang

Haifeng Yan

Zhonghua Fang

Xuebing Tian

Xiao Ying Zhou

Lizheng Zheng

Xue Lian Feng

Yang Yang Feng

Longhui Jin

VM file management includes detecting a user request to access to a virtual machine (VM) and searching a pre-defined list to determine whether the user requesting access is identified on the list. If so, a file-level snapshot is generated prior to enabling modification of a VM file by the user. The file-level snapshot includes a user attribute and is added as the top layer of a stack. The user attribute indicates a role of the user for whom the file-level snapshot is created. Each layer of the stack contains one or more other file-level snapshots. The VM file is written in the file's entirety to the snapshot in response to the user modifying the VM file. Based on the user attribute of each snapshot, a set of snapshots is selected from the stack, and the VM is modified by merging the VM files belonging to the set of snapshots selected.

Virtual machine file management using file-level snapshots

A first content and a second content of a first user are obtained. The second content is configured by the first user to be displayed to a second user instead of the first content. A familiarity degree between the first user and the second user are determined. A third content is generated based on the first content, the second content, and the familiarity degree. The third content is displayed to the second user.

Content display based on user relationship

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

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Beijing, China

Bin Xiong