ECDSA in Ethereum Digital Signatures Details of ECDSA Signatures ECRecover and Signature Verification in Ethereum ECDSA Malleability In the previous posts in this series, I introduced the concept of Digital Signatures, the signature scheme ECDSA and how it is implemented in Ethereum. In this post, I explore a feature of ECDSA, called malleability, and whether …
Ethereum Digital Signatures Digital Signatures Details of ECDSA Signatures ECRecover and Signature Verification in Ethereum ECDSA Malleability As seen in the previous post of this series, a signature scheme usually has a verification algorithm that computes directly over the public key and the signature to check if the latter is valid. Ethereum is different, and …
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Ethereum Digital Signatures Digital Signatures Details of ECDSA Signatures ECRecover and Signature Verification in Ethereum ECDSA Malleability In the previous post in this series, I introduced the concept of Digital Signatures. In this article, I give an outline of ECDSA, the signature algorithm that is used to secure the Bitcoin and Ethereum blockchains. This is …
Ethereum Digital Signatures Digital Signatures Details of ECDSA Signatures ECRecover and Signature Verification in Ethereum ECDSA Malleability If you are a cryptographer, the concept of Digital Signature will be as familiar to you as wooden blocks are to a toddler. If you are a developer, and you’ve done any work requiring some sort of authentication, …
In the final part of this series, I explore some competing technologies of zk-SNARKs, which thrive on the weaknesses of their most famous competitor.
Posts in this series: The Case for zk-SNARKs The Case Against zk-SNARKs Alternatives to zk-SNARKs I explored the strengths of zk-SNARKs in the first part of this series. They led to an explosion of interest in zk-SNARKs, and I’m sure that Vitalik Buterin’s public interest in them had a great deal to do with it. This second …
In this post, I start a new series about zk-SNARKs, and explore where they might not be the best choice for your use case. Despite their popularity, they’re not a one-size-fits-all solution, and developers should be aware of where they could be advantageously replaced by other technologies.
In my last post on a series about pitfalls when using Hash Functions, I cover Solidity and Truffle.js / Node.js. I also talk a bit about Coding Theory and Endianness of number representations.
In this post, I make a deep dive into Python hash functions, and give general principles for hashing safely.
Hash Functions can be tricky to use without errors. In this series, I show how to avoid common mistakes, with examples in Python, Solidity and truffle.js.
