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In the overall architecture of the Internet of Things, the perception layer is at the bottom and the most basic level. Information security at this level is the most vulnerable. In the process of collecting information, the sensing layer mainly uses Radio Frequency Identification (RFID) and Wireless Sensor Network (WSN). The security issue of the Internet of Things perception layer is essentially a security issue for RFID systems and WSN systems.
When the sensor receives information through the WSN, it generates a large number of sensor nodes. These nodes are often exposed to public places, remotely controlled by people or computers, lack effective protection, and are easily interfered by signal or even node capture. Furthermore, there are many security weaknesses in the routing protocol of WSN, and criminals can inject malicious routing information into the WSN to make the network paralyzed.
For WSN vulnerabilities, the industry has proposed a number of protection measures, such as strengthening the security protection of the gateway node deployment environment, strengthening the security control of the sensor network confidentiality, and increasing the node authentication mechanism and intrusion detection mechanism. However, research on WSN security issues is still rare, and there are many challenging issues to be solved: managing a large number of pre-allocated keys with limited memory space, key pre-allocation technology supporting new node joins, and low-energy encryption. Methods, intrusion models and intrusion prevention methods, secure routing methods, data processing techniques within the safety net, etc.
RFID is a non-contact automatic identification technology and one of the key technologies in IoT applications. The Internet of Things will label each item that needs to collect information, and then communicate with the reader through electromagnetic waves. This kind of contactless wireless communication has serious security risks. Because RFID tags lack the ability to ensure their own security, illegal users can communicate with electromagnetic waves through self-made readers, causing important information to flow out. Secondly, in the case that the end device and the RFID tag user are unaware of the information, the information on the tag can be easily tracked, tampered with, and then sent back to the user through the changed information, resulting in problems such as false information and decision making errors.
In response to RFID defects, combined with cost and security, the most reliable solution is to use cryptography to enhance transmission-level security and create security mechanisms.
In addition to the technical research and development of the Internet of Things security protection, a sound legal mechanism should also be implemented. At present, China has not yet perfected the Internet of Things privacy protection regulations. With the continuous application of Internet of Things technology, it is necessary to specify the source and channel of information collection, and how to implement the penalty rules once illegally collecting other people's information.
CMIC: Strengthening Information Security Protection of the Internet of Things Sensing Layer
The speed of development of the Internet of Things in China is obvious to all, but the research on information security of the Internet of Things is relatively lagging behind. The Internet is the foundation of IoT construction, so the security threat of the Internet of Things includes two aspects. First of all, the security problems encountered in the Internet will appear in the Internet of Things; secondly, the IoT system itself and related applications are also vulnerable.