Blockchain GT Blog

Explaining how to exploit batchOverflow in smart contracts ERC20

Introduction According to a group of cybersecurity researchers a new discovery has been made in relation to a new vulnerability in the tokens of Ethereum. This perceived vulnerability relates to certain tokens based on the ERC-20 standard. The vulnerability, referred to as batchOverFlow, is described by the PeckShield startup on Medium in the following article: New batchOverflow Bug

Fungibility & Blockchain

In the Blockchain world, Fungibility is mostly discussed in conversations relating to ethereum and the use of ethereumapplications. So what is it, and why is it relevant? To answer this question, we need to consider tokens, tokenization and what tokens represent. Using cryptocurrency as our example - each token coin) represents the same value as

Blockchain & Healthcare

Introduction to Blockchain Blockchain is a distributed protocol that allows to exchange information or value (tokens), between two or more parties. The information in form of transactions contained in the network is validated through consensus. Blockchain network acts as a source of trust between parties. Namely, it is a protocol that generates trust in a

Basic Cryptography to understand Blockchain Technology

cryptography. From Greek κρυπτός kryptós ‘hidden secret’ and γράφειν graphein, ‘to write’. 1.The art of writing or solving codes.   Cryptography is an area of Computer Science and Mathematics that studies the algorithms used to hide information to those not allowed to see it. Currently, these algorithms secure digital communications all over the globe. Additionally, they are

Blockchain & GDPR

Blockchain technology and its applications have involve legal challenges for authorities from around the world. Defining a legal framework in this incipient phase of the technology, even though necessary, could involve a negative impact in its development. In spite of that, there are some essential aspects that should be addressed: for example: the way of

Grant Thornton and INESE work together to train insurance companies in Blockchain technology

The first Blockchain training session to the insurance sector was held last week, organized by INESE and given by members of Grant Thornton Blockchain’s lab from Madrid, international competence center of this multinational firm since 2015. The training included sessions on the origins of the technology, with emphasis in Bitcoin, Blockchain’s evolution, its massive adoption

Grant Thornton’s Blockchain Lab team participates in the Hackathon organized by Telefónica

Telefónica Open Future crowdworking space held the first Hackathon based on Blockchain technology, “Blockchain Challenge”, on 24th, 25th and 26th of November, in Madrid. The participant teams worked for three days to develop projects based on this technology with the help of mentors and the participation of Blockchain experts. Luis Pastor, Grant Thornton’s IT Consulting

Big Spanish Companies create Alastria, to develop Blockchain in Spain

The main banking, energy, telecommunications and professional services companies, among which it is Grant Thornton, have created Alastria, the world’s first multisector regulated network based in Blockchain. This non-profit consortium was presented simultaneously in Madrid, Barcelona, Bilbao, Valencia and Málaga. It will develop Distributed Ledger Technology, which is said to be the future data exchange

Cecabank y Grant Thornton create the first Bank Blockchain Consortium in Spain

·        The new ecosystem will pioneer the real use of Blockchain in the financial sector. ·        The consortium will create the first applications with real impact in the Banking Business with this technology.   The wholesale bank Cecabank and the professional services firm Grant Thornton have created the first Blockchain Banking Consortium in Spain. The