Category: Writeup

tBTC: Navigating the cross-chain conundrum

We recently conducted a security assessment of Thesis’ tBTC. In this post, we explore a fundamental limitation of Bitcoin transaction verification within Ethereum smart contracts.
Alexander Wade
May 01, 2020

Destroying the Indestructible

This morning, I saw a link to Dharma’s IndestructibleRegistry. The idea behind this registry is that it keeps track of contracts that cannot be destroyed. It does this by verifying the contract’s bytecode on chain. In this post, I’ll show you how I managed to trick that verification and destroy an “indestructible” contract.
Steve Marx
December 11, 2019

Provably Fair Ransom

Ransom has a trust problem. Suppose I’ve birdnapped your beloved pet parakeet and am demanding a $1,000 ransom to return the bird to you…
Steve Marx
April 29, 2019

Poison Block Explorer Byte Code

You will understand how to trick a block explorer into displaying different byte code of your choosing, other than the one deployed on the…
Daniel Luca
February 11, 2019