Via Network Bitcoin Wallet Security
In this section, we will explore the security aspects of the Via Network bridge.
Bridge Wallet Security in the Via Network
The Via Network uses a MuSig2-based Bitcoin wallet to securely manage and protect users’ funds when they bridge BTC from the Bitcoin network to Via.
MuSig2 is an advanced multi-signature (multisig) scheme based on the Schnorr signature protocol. It allows multiple independent participants in Via Network's case, the Verifier Nodes to collaboratively sign transactions using a single aggregated public key and signature.
This design offers several key security and efficiency benefits:
Enhanced Security: No single party controls the wallet, a transaction can only be executed through collective agreement among authorized verifiers.
Improved Privacy: On-chain, MuSig2 signatures are indistinguishable from regular single-signature transactions.
Lower Fees & Better Scalability: Only one signature is recorded on the Bitcoin blockchain, reducing transaction size and costs.
Bridge Wallet Structure and DAO Fallback
By leveraging MuSig2, Via Network ensures that users’ bridged BTC remains fully secure and can only be moved through a coordinated and verified multi-party process.
The Via Network bridge address is designed with two spending paths to ensure both security and resilience:
Key Hash Path (MuSig2): This is the primary spending path, controlled by the Verifier Network. It requires all N out of N verifiers to participate in signing Via Network the MuSig2 protocol before any transaction can be broadcast.
Script Hash Path (DAO Fallback): This is a backup spending path, controlled by the Via Network DAO. It acts as a failsafe mechanism in the event that the Verifier Network becomes unable to process withdrawals for example, if one or more verifier nodes go offline, preventing the N/N MuSig2 signature from being completed.
Through this dual-path design, Via Network ensures continuous access to funds while maintaining decentralized control and strong security guarantees, even under network failure conditions.
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