Beijing Baidu Netcom Science and Technology Co., Ltd.

Beijing Unicorn Technology Co., Ltd

Institute of Informational Engineering, Cac

Liwei Chen

Yue Wang

Ming Wang

Yue He

Dianhai Yu

Shiqi Zhao

Xiao Yin Zhou

Xi Huang

Zhihao Zhao

Jinfeng Li

Dan Meng

Gang Shi

Cairui She

Embodiments of the present disclosure provide a method for control-flow integrity protection, including: changing preset bits of all legal target addresses of a current indirect branch instruction in a control flow of a program to be protected to be same; and rewriting preset bits of a current target address of the current indirect branch instruction to be same as the preset bits of the legal target addresses, so that the program to be protected terminates when the current target address is tampered with. By changing the preset bits of all the legal target addresses of the current indirect branch instruction to be same and rewriting the preset bits of the current target address to be consistent with the preset bits of the legal target addresses, traditional label comparison is replaced by the preset bit overlap operation, reducing performance overhead and improving attack defense efficiency.

Method for control-flow integrity protection, apparatus, device and storage medium

Computing box

A query method and apparatus. A specific implementation of the method comprises: acquiring a target historical query statement from a historical query statement collection; extending the target historical query statement based on a query log to generate an extended statement fragment associated with the target historical query statement; adding the extended statement fragment, as a statement fragment characteristic associated with the target historical query statement, into a statement fragment characteristic library of a preset model; and generating a query result corresponding to a query statement based on the statement fragment characteristic library of the preset model in response to receiving the query statement. According to an embodiment of the present disclosure, the extended statement fragment is added, as the statement fragment characteristic associated with the target historical query statement, into the statement fragment characteristic library of the preset model.

Query method and apparatus

Controller

The present disclosure discloses an interaction method and apparatus based on artificial intelligence. A specific embodiment of the method comprises: receiving a current interactive statement entered by a user through a terminal; extracting at least one type of characteristic based on the current interactive statement and a previous interactive statement entered by the user; processing the at least one type of characteristic using a pretrained neural network model to determine whether an intent maintaining relationship exists between the current interactive statement and the previous interactive statement; and if the intent maintaining relationship exists, updating a limitation condition for the previous interactive statement using the current interactive statement, performing information retrieval using the previous interactive statement with the updated limitation condition, and pushing a retrieved retrieval result to the terminal. This embodiment reduces time spent in user entry.

Interaction method and apparatus based on artificial intelligence

Growing community of inventors

Beijing, China

Liwei Chen