Bitcoin Forum

I'm trying to compile a list of wallets (hosted or local) that support message signing.

So far I have:
- Bitcoin QT v. 0.8.1
- Electrum v. 1.7.3
- Blockchain.info "my wallet"

- Armory v. 0.88.1 (Currently incompatible with Bitcoin QT, or anyone else)

Am I missing any? Also, if anybody knows the earliest versions of Bitcoin QT/Bitcoind, Electrum and Armory that supported message signing, that would be really useful.

Thanks for your help  :)


Edit: added Armory to the list

Actually, Armory implemented message signing before Bitcoin-Qt did.  Thus, Armory had no way to know how Bitcoin_Qt was going to implement it, and thus we ended up with different, incompatible signing algorithms.  So, while Armory has a "message signing" feature, it's not compatible with anyone else.

There's an active bounty (https://bitcointalk.org/index.php?topic=179422.0) out to fix this.  Hopefully, it will happen soon.  But if you are compiling the list for inter-compatible signing, Armory is not one of them.   This is also why Armory's signing is kind of intermixed with an ECDSA calculator... I started with that, then decided not to upgrade/polish it until I got a compatible algorithm implemented.

Thanks for the reply, and good work for implementing signing before QT. It's a shame that it's incompatible, but appreciate the bounty will hopefully solve that.

We're working on an app that will use the sign message feature to verify ownership of addresses, so there will be a list of compatible wallets. We are using QT to verify the signature, so hopefully we will soon be able to include Armory in our list.

Are there any other local or web wallets that I have missed out?

Ah, same for pywallet, it signed messages since as early as august 2011
Far from being a client though

As for the Armory's ability, I resolved one problem I had. And I think I'm close to solve the last one. So it should be OK soon hopefully