189 citations · 222 across the 7 of their papers we have counts for
4 papers · 1 filter
An Eye for an Eye: Economics of Retaliation in Mining Pools
Yujin Kwon, Hyoungshick Kim, Yung Yi +1
Currently, miners typically join mining pools to solve cryptographic puzzles together, and mining pools are in high competition. This has led to the development of several attack s…
Impossibility of Full Decentralization in Permissionless Blockchains
Yujin Kwon, Jian Liu, Minjeong Kim +2
Bitcoin uses blockchain technology and proof-of-work (PoW) mechanism where nodes spend computing resources and earn rewards in return for spending these resources. This incentive s…
Is Stellar As Secure As You Think?
Minjeong Kim, Yujin Kwon, Yongdae Kim
Stellar is one of the top ten cryptocurrencies in terms of market capitalization. It adopts a variant of Byzantine fault tolerance (BFT), named federated Byzantine agreement (FBA),…
Bitcoin vs. Bitcoin Cash: Coexistence or Downfall of Bitcoin Cash?
Yujin Kwon, Hyoungshick Kim, Jinwoo Shin +1
In Aug. 2017, Bitcoin was split into the original Bitcoin (BTC) and Bitcoin Cash (BCH). Since then, miners have had a choice between BTC and BCH mining because they have compatible…