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Just bought a YubiKey 5C. Going to see if I can natively sign an Ethereum transaction using a secp256k1 key from the new iPhone 15's USB-C port.

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Oh nice! And look who is the co-author!!

Thank you sir! And followed!

🫡

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Will do and I totally agree. YubiKey also makes a FIPS 140-2 modules which would be extremely secure!

Please report back! That would make for a great hybrid between a SW wallet and HW wallet - the convenience of the former with the security of the latter.

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No. The only thing I did was patch their library to support iPhone 15+. I did talk to @dcposch.eth and he’s got a way to make this work. I just haven’t had time to implement it.

following up: did you ever get this working?

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All I've done is patched the YubiKey iOS library — still need to dig into getting this to work.

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Well there may be a caveat. If your YubiKey isn’t firmware version 5.2 or above, it doesn’t support secp256k1 and it can not be upgraded so check your firmware version.

I have 2 YubiKey 5c nanos that are both at 5.1.2 so they won’t work.

was curious abt this too. So glad I bought one that was dual instead of lightening now

This could be great for crypto UX, Ledger could do it as well.

I’m building my own native product for Ethereum so im not really focused on any Wallet experiences.

I’m building my own native product for Ethereum so im not really focused on any Wallet experiences.
https://partylabs.org/

Let’s say it works, what then? Which wallet/interface could one use?

Does it actually support that curve?

I can’t seem to find anything anywhere that says it does.

Working on building zkTLS infra/products. A ruthless empiricist and meme connoisseur.

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/eulerlagrange

Yes. https://support.yubico.com/hc/en-us/articles/360016649139-YubiKey-5-2-Enhancements-to-OpenPGP-3-4-Support

Not sure that's going to work. Apple has a CryptoTokenKit framework designed to work with devices like YubiKey. Ledger aren't general purpose signing devices so you can't connect them directly to your mobile device. You need to use their apps via Bluetooth.

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Not sure that's going to work. Apple has a CryptoTokenKit framework designed to work with devices like YubiKey. Ledger aren't general purpose signing devices so you can't connect them directly to your mobile device. You need to use their apps via Bluetooth.

https://developer.apple.com/documentation/cryptotokenkit/

!!! Oh wow! I'll see if I can use my Ledger with my phone.

please please report back. I'm on Android, but that would be beyond amazing. I use my yubikeys every single day.

that’s neat! keep us informed please 🤌

excited to hear how this goes

great idea trying this

Dang, I haven’t felt a need to upgrade until now. Interested in hearing how it goes!