A survey on Iot security: Application Areas, Security Threats, and Solution Architectures
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thong-tin-so bao-cao-qpsk-1 - [cuuduongthancong.com]
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- VI. IOT SECURITY USING FOG COMPUTING A. EVOLUTION OF FOG FROM CLOUD
| C. MERKLE TREE
Merkle tree is an add-on that can be added to the blockchain data structure to enhance the security of IoT devices. This can also help in reducing the overall number of blocks being added in the chain. A Merkle tree is like a binary tree where every node contains two child nodes except the leaf nodes. The leaf nodes contain the data or transactions, and the roots are the hash values of the data on the leaf nodes [116]. Based on the size of the tree, multiple transactions can be combined to generate a single root hash. Rather than treating each transaction as a block, each root hash can be considered as a block in the chain. This can help us in reducing the number of blocks. Also, due to multiple levels of hashing, at every level in the tree, the security of the data is enhanced [117]. IoT devices involve a lot of small communications among each other and therefore using Merkle tree along with blockchain can be a promising solution [118]. D. IOTA IOTA is another upcoming and highly promising solution to secure IoT. IOTA is also a DLT (Distributed Ledger Technology) as blockchain. IOTA is specially designed for resource-constrained IoT devices. Every incoming request in the network is required to validate the previous two requests. Using this process of cumulative validations, IOTA can pro- vide a high level of security at the device or edge level. The tip selection algorithm is used for request verification. A cumulative weight is created for all requests. Higher the weight of a device in the network, more secure the device is. IOTA uses a tangle data structure as compared to the chain data structure in blockchain [119]. VI. IOT SECURITY USING FOG COMPUTING A. EVOLUTION OF FOG FROM CLOUD IoT and cloud computing are two independent technologies which have many applications. IoT has provided users with a large number of smart devices and applications. Simi- larly, a cloud provides a very effective solution to store and manage data which can be accessed from anywhere and is widely used by many organizations. IoT is generating an unprecedented amount of data, which puts a lot of strain on the Internet infrastructure. The integration of cloud and IoT has introduced an era of new opportunities and challenges for processing, storing, managing and securing data more effectively. Industry and research groups have tried to solve some issues faced by the IoT by integrating it with the cloud. The benefits of this integration are not enough to address all the issues faced by IoT. Therefore, the concept of fog computing was introduced by Cisco in 2012. Fog computing complements cloud computing rather than replacing it. tải về 6.16 Mb. Chia sẻ với bạn bè của bạn:
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