In follow-up to this earlier post from Stellaw
, today I too received a developer pre-release keepkey. Like Stellaw I did not pay for the device and they only asked me for developeuser feedback.
The package was sent via FedEx protected by more foam than a bitmain S1, the keepkey comes packaged in a classy black box (about the standard of designer cufflinks packaging) on a green/white cardboard tray, with a plastic film protecting the screen. http://imgur.com/fxONsfR http://imgur.com/KPNTVuK
Underneath you'll find a stiff 3 ply cardboard 12 row Recovery Sheet, in a matte black sleeve, and a skinny micro USB cable with a nylon rope finish. http://imgur.com/JYYa4VM
I've taken some photos of keepkey with some everyday items you might find lying around your home for scale and comparison http://imgur.com/MOLT6oG http://imgur.com/bIAcCJY
Keepkey is much wider, longer and thicker than Trezor. It does however feel extremely satisfying and solid in hand with its metal back shell. http://imgur.com/MqzUid2 http://imgur.com/raUi6Pc
The screen is fantastic to use, keepkey include some eye candy animations, progress indicator, and logo screen saver. http://imgur.com/AIGUpVj http://imgur.com/GXHbPLi
Side by side, Trezor's display is over twice as bright and of higher pixel density than keepkey, but with indoor use keepkey is adequately bright. The front shell is a fingerprint magnet.
I don't plan to fully review their software wallet as it is still in pre-release developer beta stage. Keepkey works via desktop Chrome with 2 extensions (a proxy bridge and a Chrome Wallet). This solution is up an running with a few mouse clicks and supports device initialisation and wipe, PIN entry, send, recieve and display QR code. Their wallet reminds me somewhat of kryptokit.
At the moment the Chrome Wallet does not support >12 word mnemonics or passphrases (although Darin tells me this will be supported) nor changing PIN or device label, message signing, or transaction history. Their chrome wallet checks balances through chain's API and is not dependent on a BoP server like myTrezor.
After some trial and error i was able to import my keepkey wallet into electrum 2.4.4 and saw the same balance and address tree as the Chrome Wallet.
As the python tools and electrum plugin are dev beta standard, there are some bugs still to be ironed out, particularly with regards to passphrase support.
My overall impression is that keepkey will be a winner. With its wide screen display, keepkey is very easy on the eyes and makes checking of an address, transaction details or initializing a mnemonic (or reviewing entropy/firmware signatures) a pleasure.
Keepkey is evolutionary in several ways - much improved mnemonic playback and restore. They've re thought the user experience, removed the cancel button, and added a hold-to-confirm gesture. This does however mean "cancel" requires either a mouse or keyboard button press.
In other ways the changes don't go far enough, why limit PIN to numbers 1-9, why not device wipe after multiple failed attempts, why must the passphrase be entered in plaintext on the hot computer, why no touch screen and fewer buttons not more?
Keepkey's firmware is a fork of Trezor's, has had hundreds of code commits since March 2014 and is actively developed. With its solid half metal construction, premium packaging, USB cable and security card, and 4 person management team - clearly keepkey is not targeting the budget end of the market.
Metal Trezor preorders were 3 times the price of plastic Trezors and keepkey has the differentiating features of premium metal build and finish, large screen and a mnemonic restore procedure so good that it is viable to wipe the device in between uses and restore to spend.
Their Chrome Wallet is missing many features, and currently there is no support for Greenaddress, mycelium or MultibitHD. (Whilst Trezor does support these 3 it took Trezor years before the first alternative - electrum 2.0 - became available)
Addendum : working with keepkey today they've isolated, fixed and developed a workaround for most issues I encountered. Now the official OSX electrum 2.4.4 binary works perfectly - 24 word mnemonics, passphrases, message signing, change device label, full wallet history with modifiable descriptions.
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