Blockstream Reveals MuSig2; An Easy & Privacy-Focused 2-Round Schnorr Multisignature Scheme

As the Bitcoin Taproot upgrade approaches, a multi-signature solution is in development by Blockstream engineers, according to a medium blog post on Nov 4. Two engineers, Tim Ruffing and Jonas Nick said that they have already published a blueprint for MuSig2, an advanced version of the MuSig multi-signature scheme built to facilitate collective ownership of some Bitcoin and the creation of a single authorization signature.

Notably, Blockstream had debuted MuSig1 back in 2018 but is now seeking to solve communication shortcomings in the MuSig scheme’s initial version. MuSig1 brought in a privacy aspect that previously did not exist in the CHECKMULTISIG code; this version also reduced the transaction fees. However, this particular version had implemented multiple backs and forth signing process; something that Musig2 is designed to solve.

MuSig2 Non-Interactivity Signature

As highlighted, this MuSig scheme version introduces a less interactive signing process; to be precise, only two communication rounds are required. The initiative, which is currently undergoing a peer review, is set for presentation at the Real World Crypto Conference scheduled for next year. Per the blog, MuSig2 leverages a non-interactive signing approach to enhance the utility in MuSig1. It reads,

“As the name suggests, MuSig2 is intended to be the successor of MuSig1.

It offers the same functionality and security as MuSig1 but makes it possible to eliminate almost all interaction between signers.”

Basically, MuSig2 combines the best of MuSig1 and CHECKMULTISIG functionalities to provide an ecosystem with both privacy and efficient communication. With the Taproot integration around the corner, Blockstream is set to update the Schnorr signature code library by replacing MuSig1 with MuSig2. The blog also hinted that they might test MuSig2 on Taproot code earlier, in preparation for deployment on the Bitcoin Mainnet.

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Author: Edwin Munyui

Visa Seeks Ethereum, Ripple and Bitcoin Blockchain DeVs Following Crypto Frenzy

Visa is looking to hire blockchain engineers with expertise on Ethereum, Ripple, and Bitcoin, as recently reported by Decrypt. The global payments giant has been making significant moves in the blockchain and crypto space in preparation for digital currency ecosystems. With the latest step being an ‘alleged’ human resource expansion, could Visa scale its foothold in the blockchain-based payments niche?

This new prospective hire will join Visa’s B2B, the firm’s cross-border payments solution built on blockchain that launched back in June 2019. They will work towards adding value to this distributed ecosystem hence the requirements on some blockchain languages. The job ad highlights,

“Our ideal candidate has built and released distributed applications, has worked with the Ripple, R3, Ethereum and Bitcoin blockchain, and has experience with Solidity.”

While the requirements may signal an intention to build on a network like Ethereum, Visa is more likely to leverage the Hyperledger open-source instead. This Linux developed innovation presents ‘enterprise-grade’ solutions for corporate entities and received the backing of IBM and Intel soon after it launched in 2016. With the Hyperledger network, firms have an option to create permissioned ecosystems as a way of protecting private data while communicating within a distributed platform.

Visa’s Crypto and Blockchain Enthusiasm

This California-based payment service provider is emerging as a crypto favorite given recent milestones. For starters, the firm filed for a digital dollar patent in May as the rush for CBDC’s intensifies. According to Visa’s crypto head, the CBDC trend will probably set the stage for a digital currency ecosystem, making it essential for stakeholders to be involved in the research and development. Other than a digital dollar proposition, Visa has enabled some utilities within its cards for crypto service providers such as Binance and Plutus.

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Author: Edwin Munyui