A survey on Iot security: Application Areas, Security Threats, and Solution Architectures
A. PERMISSIONED AND PERMISSION-LESS
tải về 6.16 Mb. Chế độ xem pdf
|
thong-tin-so bao-cao-qpsk-1 - [cuuduongthancong.com]
| A. PERMISSIONED AND PERMISSION-LESS
BLOCKCHAIN There are two types of blockchain architectures based on the type of data being added and the nature of application using blockchain. In permission-less blockchain, there is no specific permission required for a user to become the part of the blockchain network or to become a miner. Anyone can join or leave this network of permission-less blockchain. The best example of permission-less blockchains is Bitcoin. Although the throughput of transactions is not very high, the TABLE 4: Challenges in IoT and Possible Blockchain Solution Challenge Towards IoT Specification Possible Blockchain Solution Privacy in IoT devices IoT devices are vulnerable to exposing private user data To address such a challenge, pro- posed solution is to use Permissioned Blockchain that can secure the IoT de- vices [98], [99], [100]. Cost and traffic To handle exponential growth in IoT devices Moving towards decentralization us- ing blockchian. The devices can di- rectly connect and communicate with the peers rather than communicating via central servers [3], [101], [102]. Heavy load on cloud service and ser- vices insufficiency Cloud services are unavailable due to attacks, bugs in software, power or other problems Records are updated on different nodes on the network that hold same data so there is no single point of failure [103], [104]. Defective architecture All parts of IoT devices have point of failure that affects network and the whole device Validity of devices is verified due to blockchain. The data is also verified cryptographically to ensure that only main originator can send it [105]. Data manipulation Data is extracted from IoT devices and after manipulating, the data it is used in some inappropriate way Due to blockchain, devices are inter- locked. If any device updates data the system rejects it [106], [107]. VOLUME x, 2019 11 This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/. This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication. Citation information: DOI 10.1109/ACCESS.2019.2924045, IEEE Access Vikas Hassija et al.: A Survey on IoT Security: Application Areas, Security Threats, and Solution Architectures FIGURE 6: Basic Blockchain Architecture. permission-less blockchains can support a large number of nodes in the network. On the other hand, the permissioned blockchains have a defined set of rules to participate in the blockchain network. The miners are also the authorized persons and the blocks are allowed to be added to the chain only after their validation. The blockchain of Ripple and Hyperledger are two prime examples of permissioned blockchain. The permissioned concept of blockchain improves the overall throughput of transactions as compared to permission-less blockchains. Figure 6 shows the sample architecture of a blockchain and the way every block is connected to all the previous blocks based on cryptographic hashing. tải về 6.16 Mb. Chia sẻ với bạn bè của bạn:
|