Beijing Smartchip Microelectronics Technology Comp

State Grid Corporation of China

State Grid Information & Telecommunication Group

Xiaoke Tang

Yi Hu

Dejian Li

Yubo Wang

Jiali Hou

Jie Gan

Dongyan Zhao

Liang Liu

Zhe Zhang

Jin Yan Shao

Haifeng Zhang

Song Cheng

Xiaobo Hu

Xi Feng

Yanyan Yu

Bingrong Cui

Shiping Zang

Yinzi Tu

Tianyu Yan

Xiaoman Wang

Zhongqiang Dun

Lixin Yang

Yidong Yuan

Lang Tan

Yongwang Ma

Wennan Feng

Disclosed in the embodiments of the present invention are a security auditing system and a method for same. The security auditing system comprises an eSIM module. The eSIM module is configured to: on the basis of pre-stored auditing rules, perform a security check on each received network connection request; if the security check is passed, determine said network connection request to be a legitimate request and allow the main control terminal that sent the network connection request to perform mobile network connection; and if the security check is not passed, determine the network connection request to be an illegitimate request and prohibit the main control terminal that sent the network connection request from performing mobile network connection.

Security auditing system and method

An inverse pseudo fully-differential amplifier having a common-mode feedback control circuit and a method for maintaining a stable output common-mode level are provided. The inverse pseudo fully-differential amplifier includes the pseudo fully-differential operation circuit and a common-mode feedback control circuit. The pseudo fully-differential operation circuit includes inverter amplifiers () and (). The inverter amplifiers () and () respectively have a first feedback control terminal and a second feedback control terminal. Input terminals of the common-mode feedback control circuit are respectively connected with output terminals of the inverter amplifier () and (), and are configured to detect common-mode output voltages of the inverter amplifier () and (). An output terminal of the common-mode feedback control circuit is connected with the first feedback control terminal and the second feedback control terminal, and is configured to generate common-mode feedback to the inverter amplifiers () and () to maintain a stable common mode output level.

Inverse pseudo fully-differential amplifier having common-mode feedback control circuit

Disclosed are an elliptic curve point multiplication operation method and apparatus. The elliptic curve point multiplication operation method comprises ordered point multiplication and point addition operations. In a point addition operation process, when scanning that a current bit of a scalar K is not 0, a true point addition operation is executed, and when scanning that the current bit of the scalar K is 0, an equivalent point conversion operation is executed; the result of the true point addition operation and the result of the equivalent point conversion operation are stored in an identical register file, the register file comprising multiple registers. According to the elliptic curve point multiplication operation method and apparatus, side channel analysis and security error attack can be effectively resisted.

Elliptic curve point multiplication operation method and apparatus

An ultra-low power consumption power supply structure, comprising: a first LDO circuit, a second LDO circuit, a first Bandgap module, a second Bandgap module and a switching circuit, wherein the first LDO circuit is used for providing an LDO output voltage when an SOC chip is in a normal operating mode, and the second LDO circuit is used for providing an LDO output voltage when the SOC chip is in an ultra-low power consumption mode; the first Bandgap module is used for providing, based on a main power supply voltage, a first reference voltage for the first LDO circuit at the time of power-on startup, and the second Bandgap module is used for providing a second reference voltage for the second LDO circuit after power-on startup is completed; and the switching circuit is used for switching the mode in which the first reference voltage is output by the first Bandgap module at the time of power-on startup to the mode in which the second reference voltage is output by the second Bandgap module after power-on startup is completed.

Ultra-low power consumption power supply structure

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Beijing, China

Xiaoke Tang