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Skema Dynamic Threshold Signature Berbasis Improved ECDSA

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Blockchain technology uses a distributed system that allows each
device to connect and collaborate with one another, forming a network
with the potential to enhance security and transparency, which can be
applied to financial systems. However, the transparency of blockchain
systems has the potential to lead to attacks and privacy breaches. To
address this issue, the dynamic threshold signature scheme is an
alternative that allows for asset supervision in distributed systems.
In the blockchain system used by Bitcoin, the Elliptic Curve Digital
Signature Algorithm (ECDSA) is adopted. Several studies have pointed
out the vulnerability of weak randomness in ECDSA, which uses a
random value in each signing process. This vulnerability
brings, several improvements to the ECDSA scheme have been proposed,
one of which involves adding another private key, referred to in this
paper as improved ECDSA. This research modifies the dynamic threshold
signature scheme, which previously used ECDSA, to a scheme based on
improved ECDSA. Performance comparisons were made from this
modification in terms of execution time and time complexity.
Additionally, a security analysis based on existential forgery
attacks was conducted. It was found that the performance of the two
schemes was not significantly different. Moreover, from the security
analysis of existential forgery based on several assumptions, it was
found that the success probability of existential forgery on this
scheme is very low which then can be omitted. Therefore, this scheme
can be proposed as an alternative for enhancing security in
blockchain systems

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Detail Information

Series Title

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Call Number

2024 MIK s

Publisher

Bogor : Politeknik Siber dan Sandi Negara., 2024

Collation

xiv, 87 hal

Language

Indonesia

ISBN/ISSN

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Classification

NONE

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Edition

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Subject(s)

blockchain
Dynamic Threshold Signature
Improved ECDSA

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