Page 97 - Handbook of Deep Learning in Biomedical Engineering Techniques and Applications

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A critical review on using

blockchain technology in

education domain

G. Sudha Sadasiuvam
Department of CSE, PSG College of Technology, Coimbatore,
Tamil Nadu, India

1. Introduction
Blockchain (BC) is a decentralized public ledger of data in which
a record of transactions is maintained across several computers
(nodes) that are linked in a peer-to-peer network. All valid trans-
actions that have been executed are shared among users in the
network. Even though BC technology was initiated with digital
crypto currencies such as Bitcoin [1], it is viewed as an evolving
technology with the potential to revolutionize the current digital
operational scenario and business practices of finance, govern-
ment services, and computing. The hypothesis behind BC is to
create a digitally distributed consensus, which ensures decentral-
ized, auditable, and secured storage of data. This enables
enhancement of data security and transparency of activity. The
basic tenets of BC include security via encryption, preservation
of integrity through immutability, decentralization of control,
verification in a distributed environment, and transparency [2].
Whenever a user wants to add data to a BC, the following
actions are performed (Fig. 4.1):
(i) User node sends a transaction request to the network. It
contains sender/receiver addresses, data values, and digital
signature of the sender.
(ii) A data block containing the transaction is created and sent to
all the nodes in the network.
(iii) Blocks are verified/validated by special nodes called as
miners using game theoretic approaches.

Handbook of Deep Learning in Biomedical Engineering. https://doi.org/10.1016/B978-0-12-823014-5.00005-3
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