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Understanding Defi Flash Loans: Complex Attacks, Inflation and Composable Systems

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Two recent flash loans on the defi platform Bzx have started a fierce debate about the subject of using uncollateralized loans in a quick trade. Essentially these flash loans are providing people with the ability to borrow crypto without relinquishing any collateral. The scheme was used to exploit funds from the Bzx platform twice, as … Read more

Honest Nodes Spoiling a Theft Attempt Is Not a 51% Attack, BCH Devs Detail

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A number of Bitcoin Cash detractors and media publications have recently been spreading a false narrative that the BCH network was ‘51% attacked.’ In reality, however, honest nodes used their hashrate to stave off attacker nodes that were attempting to steal funds on the network. Also Read: Massive Growth by P2P Exchange and AT&T Accepting … Read more

Bitcoin History Part 10: The 184 Billion BTC Bug

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There was something unusual about Bitcoin block 74638. It was Core developer Jeff Garzik who first spotted it, commenting on the “quite strange” transaction outputs, which stood at 92233720368.54 BTC apiece. That wasn’t meant to happen. Within an hour, another forum user had started a thread titled “overflow bug serious” in which he implored “We … Read more

Zcash Bug Demonstrates the Difficulty of Auditing Complex Cryptocurrencies

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A recent counterfeiting bug in Zcash demonstrates that the added functionality of so-called second generation blockchains comes at a price. The vulnerability, which existed for years before being patched in October, could have been exploited to generate additional coins. As every major cryptocurrency since Bitcoin has demonstrated, added complexity corresponds with lower security. Also read: Australian … Read more