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Antoine Poinsot darosior

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@jfdm
jfdm / sodium-documented.h
Last active March 18, 2021 19:45
A well documented version of libNaCl and libSodium's ABI.
/** \mainpage
*
* __NaCl__ (pronounced _salt_) is a new easy-to-use high-speed
* software library for network communication, encryption, decryption,
* signatures, etc. NaCl's goal is to provide all of the core
* operations needed to build higher-level cryptographic tools.
*
* __Sodium__ is a portable, cross-compilable, installable,
* packageable, API-compatible version of NaCl.
*
@dcousens
dcousens / _scripttemplates.md
Last active February 3, 2024 18:59
Transaction / Script Templates
  • <> represents data or script
  • {} represents data that must prefixed by OP_PUSHDATA
  • [] represents multiple {}

Standard Scripts

PubKey (pay-to-pubkey / P2PK)

Address: N/A
scriptPubKey: {pubKey} OP_CHECKSIG
@laanwj
laanwj / reducing-bitcoind-memory-usage.md
Last active August 28, 2022 09:44
Reducing bitcoind memory usage
@chris-belcher
chris-belcher / design-for-improving-joinmarkets-resistance-to-sybil-attacks-using-fidelity-bonds.md
Last active December 4, 2021 08:30
Design for improving JoinMarket's resistance to sybil attacks using fidelity bonds

Design for improving JoinMarket's resistance to sybil attacks using fidelity bonds

13/7/2019

tl;dr

JoinMarket can be sybil attacked today at relatively low cost which can destroy its privacy. Bitcoins can be sacrificed with burner outputs and time-locked addresses (also called fidelity bonds), and this can be used to greatly improve JoinMarket's resistance to sybil attacks.

With real-world data and realistic assumptions we calculate that under such a fidelity bond system an adversary would need to lock up 30,000-80,000 bitcoins for months, or send 45-120 bitcoins to burner addresses to have a good chance of sybil attacking the system if it were added to JoinMarket.