Re: [bitcoin-dev] Fwd: BIP 340 updates: even pubkeys, more secure nonce generation

2020-03-03 Thread Marko via bitcoin-dev
That is an interesting point. Does the same concern apply to anti nonce covert channel protocols? In those, the host would mix in a random nonce of its own. The process is still deterministic and can be checked during signing, but unless the host persists the nonce contributions it provides, one ca

Re: [bitcoin-dev] Nonce blinding protocol for hardware wallets and airgapped signers

2020-02-28 Thread Marko via bitcoin-dev
Thanks for starting this initiative; it has been a long standing goal of mine to implement and release this protocol. Your blog post on the topic actually inspired me to pick up this work again a few months ago. Jonas Nick has implemented the protocol in the secp256k1 library for Schnorr sigs here