Posts with the tag ethereum

This is a writeup of the “bank” challenge, which I was the first to solve, from the Ethereum Paradigm CTF.

I was the first to solve a particularly interesting smart contract challenge in a recent CTF competition. This post explains the vulnerability I found and how to exploit it.

Probabilistic payments are an efficient solution for practical micropayments.

The Ethereum blockchain has a programming capability called “smart contracts”. That term is misleading. For the purpose of understanding, I prefer the term “stored procedures”.