If I have to use a multisig online wallet the only things I ask for are:
in a 2 of 3 multisign I have to create the 3 priv keys and I am the one who gives one of them to the online wallet.
the other 2 will be cold priv keys ( one on a trezor/coldwallet and the other on a paperwallet)
privs keys generated for third-parties are not enough for a serious user.
IMHO is better an aproach like this:
https://api.trustedcoin.com/#/example-2-of-3 Everything is done in browser for you, client side.
So you technically make the keys. Using the open-source portion you can create your own addresses offline. Thus fufilling both your requests. What needs to be known is this product has to be able to reach everyone. Not just technically proficent, it's IMPERATIVE for the spread of multisig.
"Priv keys generated for third-parties are not enough for a serious user."
That claim isn't tested, so I can't attest or confirm that. No business I know of is currently embracing multi-sig. I do know of businesses I've been in contact with that does want to use multi-sig but just couldn't piece it together.
Bitcoin is built for a global economy so no one has to exchange currency anymore. All money united into one math based coin. Multisig is based on securing pockets trustlessly and providing the need for businesses to get involved. The last thing we want to hear about is a business getting robbed of millions in coins because a rouge employee or floating key.
Trusted coin is nice, but it has a withdraw delay. If you need to pay on the fly you simply can't. Also it's a little clunky and it's not clear on how to access your coins. Simplicity, usability and accessibility is what FrozenBit does.
Can All three keys be generated offline? and then, one of them sent to you? sorry if i didnt undestand, but not too much info about how it works in your web/post
I understand your desire of bringing easiness , but when we talk about btc, security goes first.
watching this project.... good luck