Encryption method of power quality monitoring equipment
A technology of power quality monitoring and encryption method, applied in the field of encryption, can solve problems such as system crash, loss of monitoring function, accidental tampering of system code, etc., and achieve the effect of simple encryption process, less system resources, and guaranteed security
Inactive Publication Date: 2012-04-25
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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Problems solved by technology
Design flaws and interface networking also provide more opportunities for hackers to attack. Once the monitoring equipment is attacked, the system with poor security protection capabilities may crash at any time and lose the monitoring function
[0004] Security problems in embedded systems include: malicious tampering of system code, accidental tampering of system code, system cloning and theft of services
Method used
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[0020] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.
[0021] like figure 1 As shown, the encryption method of the power quality monitoring device of the present invention is implemented by an encryption chip with a single-memory multi-logic partition structure; in this embodiment, a logic encryption memory card chip with model AT88SC014C designed by ATMEL Company of the United States is used.
[0022] The encryption chip is connected to the main chip of the monitoring device by using the IIC bus connection; specifically, pins 1, 2, 3, and 7 of the encryption chip are suspended; pin 8 is directly connected to the power supply terminal VDD33, and the pin 4 is grounded; pin 6 is connected to the clock terminal SCL, and is also connected to the power supply terminal VDD33 through a pull-up resistor R42; pin 5 is connected to the data terminal SDA, and is also connected to the power supply terminal VDD33 thro...
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The invention relates to an encryption method of power quality monitoring equipment. The method comprises: in an encryption chip with a structure of a single memory and multiple logic partitions, dividing a user security code zone, a user code comparing counting zone and several independent application sub-zones, each of which is provided with a code area and a code comparing counting area, a code erasing area and a code erasing and comparing counting area, as well as an application data area. Only when input checking codes are in accord with reference characters stored in chip zones or application sub-zones can corresponding reading-writing or erasing operations be implemented to the chip zones or application sub-zones. When incorrect checking codes are input up to certain times, the whole chip zones or corresponding application sub-zones can be locked, thus ensuring data information security. The method of the invention is characterized by simple encryption process, less system resource occupation, no performance loss to program operation, violent decryption resistance, and strong reliability.
Description
technical field [0001] The invention relates to an encryption method, in particular to an encryption method of power quality monitoring equipment. Background technique [0002] Power quality monitoring equipment is an important tool to detect power quality, and it plays an important role in power transmission and distribution. The safety and reliability of power quality monitoring equipment are increasingly concerned by the power sector and related industries. [0003] With the increase of embedded system functions and the networking of interfaces, the security problems of power quality monitoring equipment are more prominent. Design flaws and interface networking also provide more opportunities for hackers to attack. Once a monitoring device is attacked, a system with poor security protection capability may collapse at any time and lose its monitoring function. [0004] The security problems of embedded systems include: malicious tampering with system codes, accidental tam...
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IPC IPC(8): G11C7/24
Inventor 刘隽陆如郭继全李新雄
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO