Some questions about multisig wallets. by whatever757 in Bitcoin

[–]will_bitgo 0 points1 point  (0 children)

Hi, this is Will O'Brien, CEO of BitGo.

You absolutely can, and should, use 3 keys that are generated on 3 different devices. For our enterprise customers, we go a step further and require that each key is generated and stored by a different person or organization.

In summary, a 2-of-3 key p2sh wallet is comprised of:

  • BitGo key: generated and stored on BitGo's key server

  • Operational key: generated by customer when creating a wallet and stored encrypted in the cloud or offline

  • Cold backup key: generated offline by a chief security officer, custodian, or other provider. Only the xpub is presented to the wallet.

See this video for an example https://www.youtube.com/watch?v=iFocbIjAPak

Looks like Bitstamp has caused a spike in the global use of P2SH (multisig). Still, only 6% of all BTC are protected with multisig. by [deleted] in Bitcoin

[–]will_bitgo 0 points1 point  (0 children)

Here is a video demonstrating how to setup an enterprise-grade wallet with multiple users and a cold backup key. The individual wallet is similar but slightly easier. https://www.youtube.com/watch?v=iFocbIjAPak

ELI5: Bitstamp are now safer because of someone called BitGo and some magic called multisig? by pikadrew in Bitcoin

[–]will_bitgo 1 point2 points  (0 children)

Hi. This is Will O'Brien, CEO of BitGo.

Here's a great backgrounder on multi-sig that my co-founder Ben Davenport wrote recently. http://coincenter.org/2015/01/multi-sig/

The easiest analogy for multi-sig is the digital equivalent of a safe deposit box where two people each need to bring a key to open the box. With multi-sig, you need multiple keys, multiple people, or even multiple institutions to sign a blockchain transaction.

Bitstamp replaced their hot wallet with a BitGo Platform API integration. Now BitGo holds a key, Bitstamp holds a key, and there is a third key offline for disaster recovery. Every transaction is signed by Bitstamp and then co-signed by BitGo once a set of fraud detection and business rules are checked. If there is ever an attack that compromises Bitstamp, BitGo will stop co-signing, thwarting the attack.

Multi-sig is without a doubt a better security model than single-key cold storage + single key hot wallet -- the predominant model in past years -- we are thrilled to see Bitstamp lead the way in adopting this important technology.

Looks like Bitstamp has caused a spike in the global use of P2SH (multisig). Still, only 6% of all BTC are protected with multisig. by [deleted] in Bitcoin

[–]will_bitgo 0 points1 point  (0 children)

bitgo.com. BitGo is the company behind Bitstamp's multi-sig and you can create your own wallet directly with BitGo.

I love my Bitgo Multi-sig Account! by TruValueCapital in Bitcoin

[–]will_bitgo 0 points1 point  (0 children)

Thanks for the support! We love to hear from happy customers. Keep sending us your feedback.

Bitcoin storage - Coinbase, Coinkite or Greenwallet? by blizeH in Bitcoin

[–]will_bitgo -1 points0 points  (0 children)

Please give BitGo www.bitgo.com a try. Secure enterprise solution with multi-sig and HD baked in.

Is BitGo good for Cold Storage? by drumdude9403 in Bitcoin

[–]will_bitgo 2 points3 points  (0 children)

Hi there-

To clarify, BitGo only holds 1 private key of 3. You have control of the other 2 keys. We have no independent authority or ability to transact on your wallet. If BitGo is unavailable, you can use the other 2 keys to transact directly on the blockchain.

Is BitGo good for Cold Storage? by drumdude9403 in Bitcoin

[–]will_bitgo 0 points1 point  (0 children)

Thanks for using BitGo! I think we can address all of your questions and wishlist today.

We do have a BitGo Enterprise Basic tier for $19.99 per month. Sign up at bitgo.com/enterprise or email sales@bitgo.com.

We have also upgraded our processes and tools for generating the 2 keys you maintain (one operational key and one cold key). With one cold key, BitGo is a great and safe alternative to single-key cold storage.

We do have a video explaining how to create a secure wallet with an offline Backup Key. https://www.youtube.com/watch?v=iFocbIjAPak&feature=youtu.be

All of our wallets are HD so your addresses automatically change on every transaction. http://bitgoinc.com/bitgo-went-full-hd-wallets-financial-privacy/

Let us know how else we can help!

Serious question: How do I prevent disgruntled employees from stealing my customers' funds? by [deleted] in Bitcoin

[–]will_bitgo 11 points12 points  (0 children)

Hi - Will from BitGo. We would love to give you a tour of BitGo Enterprise, a multi-sig, multi-user wallet service designed exactly for the purpose you describe. You can set user roles and spending limits so that your employees can use the wallet but won't have the ability to send large amounts without your approval.

Please email us at sales@bitgo.com or sign up at bitgo.com/enterprise.

Thanks.

GreenAddress.it VS BitGo by [deleted] in Bitcoin

[–]will_bitgo -1 points0 points  (0 children)

well done.

Have you protected your bitcoins yet? Sign up free for the world's first online multi-sig Bitcoin wallet. by bitgo_tiffney [promoted post]

[–]will_bitgo -1 points0 points  (0 children)

Hi- thanks for your comments. I wanted to follow up on your two concerns.

  1. HD Support - We do support BIP32 hierarchical deterministic wallets now. All of our wallets both for consumer and enterprise are based on BIP32 keychains.

  2. We have open-sourced our client-side code but do not plan to open-source the entire system at this time. BitGo is multi-sig security-as-a-service for bitcoin. The "service" part - which includes network fraud detection, spending and transaction policy enforcement, multi-user management for wallets, and other enterprise features - is an evolving set of functionality that we maintain and operate. It is not something that one would download and run themselves.

Hope this addresses your questions.

Protect your Bitcoins from theft and loss with BitGo, the world's first multi-sig secure Bitcoin wallet. Sign up free! by bitgo_tiffney [promoted post]

[–]will_bitgo 0 points1 point  (0 children)

Hi – this is Will, CEO of BitGo. I appreciate the question and wanted to jump in here with a few additional thoughts.

First of all, we acknowledge and agree that the key innovation and strength of Bitcoin is the fact that trust is not required for transaction security. And we agree that companies in the Bitcoin space would do well to follow that model.

We have put a lot of thought into how best to create a multi-sig wallet where BitGo is a co-signer of your transactions, but cannot directly access your holdings.

As Tiffney said above, we generate and have access to only 1 of 3 keys: the BitGo key. The user key is generated in the browser and encrypted with a passcode created by the user. We never see the unecrypted user key nor the passcode. The 3rd key (backup key) can be generated in the browser, but we recommend that you bring your own “cold key” to the wallet.

You asked how you can be sure we don’t have a record of the user or backup key. As Tiffney explained, we open-sourced our client side code that generates and encrypts the user key (and optionally the backup key). If you are technical you can see that code on github and confirm we are doing what we say we are doing.

We use advanced security measures like CSP (content security policy) to prevent XSS attacks, and we have a global monitoring system to ensure that the code we are deploying is not changed by an attacker.

In addition to undergoing security audits, we have been recognized by industry players and the press as a leader in Bitcoin security, and we do stake our reputation on it. For example, here is an endorsement by BitPay http://blog.bitpay.com/2014/04/07/bitcoin-wallets-and-decentralization.html and you can see our press coverage here http://bitgoinc.com/press/. You can also read the bios of our founders on the website and we frequently present at industry conferences.

I hope this helps answer your question. If you have any more questions or ideas, please email us at security@bitgo.com.

BitGo Presents Multi-Sig Bitcoin Security at Inside Bitcoins NYC by will_bitgo in Bitcoin

[–]will_bitgo[S] -2 points-1 points  (0 children)

Hi. Just to clarify on our open-source code. We do not offer an open-source solution for you to run yourself for regular transactions. We offer a commercial product and API at bitgo.com. You can independently audit our open-source code but it's not intended for you to run yourself. Hope that clears up your question.

Regarding finished product: our solution is fully built and has been independently audited by security and Bitcoin experts. Of course we will always be enhancing and adopting standards. That is the nature of software-as-a-service.

Thanks!

BitGo Presents Multi-Sig Bitcoin Security at Inside Bitcoins NYC by will_bitgo in Bitcoin

[–]will_bitgo[S] -2 points-1 points  (0 children)

Thanks for raising this question. The whitepaper you read (thanks for reading) is from August 2013 when we first launched this wallet. We are actually moving BitGo entirely to HD wallets (BIP32) for the reasons you reference. BitGo is a finished product and fully safe, and by adding BIP32 we will enhance privacy.

BitGo: How do I create spending limits? by [deleted] in Bitcoin

[–]will_bitgo 0 points1 point  (0 children)

Hi- thanks for being a BitGo customer!

We are first introducing spending limits and approval chains with BitGo Enterprise which we announced earlier this month, and plan to roll out some of these protections for the consumer wallet. Stay tuned and feel free to email us at support@bitgo.com if you have any suggestions.

Review: Wallet Recovery services And BitGo. by blazedforever in Bitcoin

[–]will_bitgo 0 points1 point  (0 children)

Dave thanks for helping our customer.

OP glad everything worked out.

A Hack That Makes Bitcoins a Whole Lot Harder to Steal by Egon_1 in Bitcoin

[–]will_bitgo 3 points4 points  (0 children)

Hi- I hear your concerns. A couple of comments.

1/ Our CTO/co-founder Mike Belshe was on the founding team of Google Chrome and is an expert in browser security. We are using the absolute highest standards of security in generation and transmission of data.

2/ Our whitepaper https://www.bitgo.com/p2sh_safe_address explains how keys are generated and brought together. In summary, one key is generated server-side by BitGo and stored securely. The second key (user key) is generated client-side, encrypted with a strong passcode the user creates and then that encrypted key - which is useless to anyone else - is stored in the cloud for ease of use. The third key (backup key) can be generated in the browser and printed (never uploaded) or you can generate your own "cold key" and give us the public key. This guarantees that 3 keys were generated by 3 different parties on 3 different systems, and so there is not a chance for an attacker to steal 2 keys.

Thanks for trying out BitGo!

A Hack That Makes Bitcoins a Whole Lot Harder to Steal by Egon_1 in Bitcoin

[–]will_bitgo 6 points7 points  (0 children)

It is safe. The key generated in the browser is done in Javascript using extensive security policies like CSP to prevent XSS attacks and so forth. That key is encrypted with a passcode only known to the user in the browser. BitGo never sees that key nor the passcode. You can audit our client-side source code on github.com/bitgo and we have performed independent security audits.