Abstract: A method for secure data transmission in wireless sensor network includes that: the network user determines a master key and inputs it into a central node and a device node; after the central node and the device node have authorized each other, the central node generates a new session key and sends it to the device node; while the central node and the device node communicate with each other, the data sending party uses the new session key to encrypt the data for transmission and verify the integrity of the data, and the data receiving party uses the session key to decrypt the data and verify the integrity of the data.

Abstract: A development verification apparatus for verification of universal chips, including an object design module for storing and executing the object code of the chip to be verified, a control processing module for executing the control program etc. of the user of the development verification apparatus, a power management module for managing the power and charging the battery, and an extended function module for implementing developing function in various fields.

Abstract: A clock synchronization method includes: A) configuring a device to determine a time interval between issuance of a command by a network coordinator and the completion of the transmission of a (SFD) of a beacon frame by the network coordinator; B) upon completion of the reception of the SFD byte of the beacon frame by the device, configuring the device to generate a synchronization signal; C) in response to the synchronization signal, configuring the device to record a first clock time thereof; D) upon completion of the reception of the beacon frame by the device, configuring the device to record a second clock time thereof; E) configuring the device to calculate a synchronization clock time based on the time interval, and the first and second clock times; and F) configuring the device to adjust a clock time thereof to the synchronization clock time.