Woonkly Security Audit (DEX & STAKE)

Reading Time: 6 minutes

Introduction CoinFabrik was asked to audit the contracts for the Woonkly project. First we will provide a summary of our discoveries and then we will show the details of our findings. Summary The contracts audited are from the STAKESmartContractPreRelease repository and DEXsmartcontractsPreRelease repository at GitHub. The audit is based on the commit 779522de8afcf9285d660abdcc0fb10a62f6f659, and 49777cd67d0227c21437236ab9f42b501a864895 […]

Censorship of Harmful Data in Blockchains

Reading Time: 17 minutes

Public blockchains allow insertion of arbitrary data. Even specific-purpose blockchains like Bitcoin already contain a lot of non-financial data. Although this data insertion can be beneficial in some use cases (e.g. proof of existence), it can also cause damage. If a blockchain contained videos with instructions on how to torture someone, there would immediately be broad consensus that this data must be deleted. But since blockchains are supposed to be immutable databases, the question is: what can be done if this happens?

Smart Contract Audit Process

Reading Time: 6 minutes

A security audit is a process in which a client subjects his or her smart contracts to a review, in which one or more auditors search and document vulnerabilities that may alter the project correct functionality. The main idea of this post is to specify the process of audits, who belongs to them and how the different individuals interact from the moment the client reaches us to the moment we end communication with them.

Using the CardContact SmartCard USB HSM in an Ethereum PoA Chain

Reading Time: 4 minutes

After testing the performance of Ethereum using PoA, we tested the usability of the CardContact SmartCard-HSM USB token on an ethereum Proof of Authority network. The HSM allows to store and use multiple encryption keys, both RSA and Elliptic Curves (including secp256k1), for applications like issuing certificates as a CA, and with any application that […]

Some Insights into Cardano ´s Blockchain

Reading Time: 5 minutes

In this blog post, we present a high-level overview of the paper describing the Ouroboros Proof of Stake protocol implemented in Cardano´s blockchain. After the overview follow some comments about theoretical aspects of the protocol.
In general, Proof of Stake (PoS) consensus protocols elect the network nodes responsible to send the next block to the blockchain on the basis of the nodes’ amount of stake.

Dogethereum: A Decentralized Blockchain Bridge Between Dogecoin and Ethereum is Born

Reading Time: 2 minutes

The second stage of the Dogethereum bridge was presented on September 5, 2018 at 10 am (PT) and live streamed. The bridge uses “superblocks” to move coins from Dogecoin to Ethereum and collateralization to move coins from Ethereum to Dogecoin. We are excited because this innovation can also be used to bridge other blockchain pairs. […]