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Polar Coded Merkle Tree: Improved Detection of Data Availability Attacks in Blockchain Systems. (arXiv:2201.07287v1 [cs.IT])
Jan. 20, 2022, 2:20 a.m. | Debarnab Mitra, Lev Tauz, Lara Dolecek
cs.CR updates on arXiv.org arxiv.org
Lights nodes are commonly used in blockchain systems to combat the storage
burden. However, light nodes are known to be vulnerable to data availability
(DA) attacks where they accept an invalid block with unavailable portions.
Previous works have used LDPC codes with Merkle Trees to mitigate DA attacks.
However, LDPC codes have issues in the finite length due to the NP-hardness of
ascertaining the minimum stopping set size, and in the asymptotic regime due to
probabilistic guarantees on code performance. …
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