📅 Original date posted:2019-10-03
📝 Original message:Hi everyone,
We would like to share a paper for broad discussion, it is titled
"Bitcoin Chain Width Expansion Denial-of-Service Attacks".
>From the abstract: The attacks leverage unprotected resources for a
denial-of-service by filling the disk and exhausting the CPU with
unnecessary header and block data. This forces the node to halt
operation. The attack difficulty ranges from difficult to easy. There
are currently limited guards for some of the attacks that require
checkpoints to be enabled. This paper describes a solution that does not
require enabling or maintaining checkpoints and provides improved security.
As the checkpoints in Bitcoin Core have not been maintained or updated
since mid 2014, this is especially relevant. Bitcoin Core implements
headers-first synchronization, since 2014, that provides the base for
the further improvements upon that design.
The paper is available at:
https://bcoin.io/papers/bitcoin-chain-expansion.pdf
The proposed solution has been implemented in Bcoin and is available at:
https://github.com/bcoin-org/bcoin/tree/chain-expansion
Best,
Braydon Fuller
Braydon Fuller [ARCHIVE] /
npub1fx…xxtaa
2023-06-07 18:21:01
in reply to nevent1q…wlrw
Author Public Key
npub1fx2eyw7avet7dut0slazcehwvrrlhjp2u9jc9zd92l7nexpxeahs4xxtaaPublished at
2023-06-07 18:21:01Event JSON
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"content": "📅 Original date posted:2019-10-03\n📝 Original message:Hi everyone,\n\nWe would like to share a paper for broad discussion, it is titled\n\"Bitcoin Chain Width Expansion Denial-of-Service Attacks\".\n\n\u003eFrom the abstract: The attacks leverage unprotected resources for a\ndenial-of-service by filling the disk and exhausting the CPU with\nunnecessary header and block data. This forces the node to halt\noperation. The attack difficulty ranges from difficult to easy. There\nare currently limited guards for some of the attacks that require\ncheckpoints to be enabled. This paper describes a solution that does not\nrequire enabling or maintaining checkpoints and provides improved security.\n\nAs the checkpoints in Bitcoin Core have not been maintained or updated\nsince mid 2014, this is especially relevant. Bitcoin Core implements\nheaders-first synchronization, since 2014, that provides the base for\nthe further improvements upon that design.\n\nThe paper is available at:\nhttps://bcoin.io/papers/bitcoin-chain-expansion.pdf\n\nThe proposed solution has been implemented in Bcoin and is available at:\nhttps://github.com/bcoin-org/bcoin/tree/chain-expansion\n\nBest,\nBraydon Fuller",
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