Abstract: The failure of Fomo3D and its followers is highly related to bugs in their smart contract design. Here we offer a detailed analysis of two problems in Fomo3D-like games from the view of security, along with several practical solutions for your reference. …

The first round of Fomo3D has ended and the winner’s address is 0xa169, with a prize of 10,469.66 ethers. You may think that the winner is just an ordinary participant. SECBIT Labs first found that the Fomo3D winner played a special attack trick to sharply decrease the number of transactions…

Vulnerabilities in smart contracts are threatening blockchain projects, developers and investors for a long time. A growing number of security teams are putting efforts in this field with various approaches to secure contracts. SECBIT Labs proposes combining the formal proofs with the traditional test and security audit. In this article…

an Analysis of ATN Token’s CUSTOM_CALL Bug — On June 20th, 2018, AI Technology Network (ATN) reported an attack on ATN smart contract: an hacker set his address as owner via a bug in ATN Token contracts and issued 11 million ATN tokens for himself on May 11th, 2018. ATN team located the bug, discovered the hacking method…