Implementing of forking after withholding FAW attack on bitcoin system
Nowadays many applications have employed the blockchain technology from sam- ple cryptocurrency to smart contracts applications. Bitcoin is one of the cryp- tocurrency application and digital payment system. It is considered as the first decentralized digital currency system. It was invented by u...
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| Main Author: | |
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| Format: | Thesis |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/68967/1/FSKTM%202018%2040%20-%20IR.pdf |
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| Summary: | Nowadays many applications have employed the blockchain technology from sam-
ple cryptocurrency to smart contracts applications. Bitcoin is one of the cryp-
tocurrency application and digital payment system. It is considered as the first
decentralized digital currency system. It was invented by unidentified person or
group under the name of Satoshi Nakamoto in 2009 (Nakamoto, 2008). The most
three features should be achieved by Bitcoin are decentralized, users anonymity,
and consensus. In order to achieve these vital features the Bitcoin system should be
provably secure against the attacks. Many attacks have been proposed to change
unfairly the reward system of the mining pool and allow the malicious miners to
earn undue wage. Selfish Attack, Block Withholding (BWH) Attack and Fork-
ing After Withholding (FAW) Attack are three attacks which abusing the reward
system and letting the infiltration miners to receive un unearned profits and as
a sequence this will affect the decentralized feature of the Bitcoin system. Some
studies proposed a solution for Selfish Attack and Block Withholding attack such
(Eyal and Sirer, 2014b) and (Bag et al., 2017). FAW attack is first introduced
by (Kwon et al., 2017) where this attack combines two attacks: Selfish and BWH
attacks. In order to come up with a solution for FAW attack (Kwon et al., 2017)
propose partial countermeasures for preventing their FAW attack. However, their
solution is neither perfect nor practical. Therefore this study addresses this attack
and analyzes its strategy then come up with a prevention solution. The result of
this study shows that our prevention solution is practical and more effcient. |
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